CN101713300A - Scroll expander - Google Patents
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- CN101713300A CN101713300A CN200910252649A CN200910252649A CN101713300A CN 101713300 A CN101713300 A CN 101713300A CN 200910252649 A CN200910252649 A CN 200910252649A CN 200910252649 A CN200910252649 A CN 200910252649A CN 101713300 A CN101713300 A CN 101713300A
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Abstract
The invention provides an scroll expander to improve both the reliability and performance. Lubricating oil 6 held at a suction pressure is supplied into a counter-lap side end plate rear face 13d of a revolving scroll 13. Communicating passages 30a and 30b to communicate the end plate rear face 13d and the lap bottom 13b of the revolving scroll center portion are formed to the end plate 13a. Thereby, since the lubricating oil 6 is supplied into a suction part, and discharged lubricating and sealing a fixed scroll 12 and the revolving scroll 13 successively following the expansion process, so as to provide the relible scroll expander.
Description
Dividing an application of the application for a patent for invention that the application is that Panasonic Electric Equipment Industrial Co.,Ltd submits to, application number is 200610099633.8, the applying date is on April 28th, 2006.
Technical field
The present invention relates to a kind of scroll expander, decide the engagement of vortex and moving vortex by making, between both sides, form expansion chamber, when making vortex rotation according to the rotation control of rotation control mechanism, expansion chamber moves when changing volume, thereby carries out suction, exapnsion, the discharge of working fluid.
Background technique
All the time in this scroll expander, for the slip surface of deciding vortex and moving vortex is lubricated, the lubricant oil that will be stored in the sealed case bottom by oil feed pump draws up to be supplied with.But owing to when making oil feed pump, must need complicated cutting etc., thereby there is the problem that causes that cost increases.At this problem, disclose and a kind ofly followingly such passed through inexpensive construction and can carry out lubricated reliably technology (for example referring to Patent Document 1).
Figure 12 is the roughly sectional view of existing scroll expander.In this scroll expander, comprise working fluid ingress pipe 44 and lubricant oil suction pipe 46.Working fluid ingress pipe 44 is fixed on to be decided on the vortex 41, and the working fluid in the sealed case 42 is directed in the expansion chamber 43.One end of lubricant oil suction pipe 46 links to each other with working fluid ingress pipe 44, and the other end is immersed in the lubricant oil 45 that is stored in sealed case 42 bottoms.According to Bernoulli's therem, the refrigeration agent by flowing in the expansion chamber 43 from working fluid ingress pipe 44 draws up the lubricant oil 45 that is stored in sealed case 42 bottoms come.
Patent documentation 1: TOHKEMY 2003-166402 communique
But,, other oil feed pump etc. must be set for the sliding position outside the slide part of deciding vortex and moving vortex, for example bearing or rotation control mechanism are lubricated.
And, when carrying out fuel feeding according to Bernoulli's therem owing to lubricant oil is drawn up by the refrigeration agent that flows into from the working fluid ingress pipe in the expansion chamber, so when the refrigerant flow that flows into for a long time, can suck lubricant oil in a large number, therefore have the low problem of suction efficiency.
Summary of the invention
Thereby the objective of the invention is to address the above problem, provide a kind of and can be lubricated slide part, and can prevent the scroll expander that suction efficiency is low by simple structure.
The scroll expander that technological scheme of the present invention 1 is related, comprise expansion mechanism portion, this expansion mechanism portion makes decide vortex and the moving vortex that erect the vortex shape scroll wraps from end plate nibble to be incorporated in and form expansion chamber between the both sides, and make above-mentioned moving vortex move the suction of carrying out working fluid by above-mentioned expansion chamber while changing volume when circular orbit rotates under the rotation controlled conditions according to the rotation control mechanism, expand, discharge, it is characterized in that, to supply to by the lubricant oil that suction pressure kept on the end plate back side of scrollwork back side of above-mentioned moving vortex, on the end plate of above-mentioned moving vortex, be provided with the path that the scroll wraps bottom surface of the above-mentioned end plate back side and above-mentioned moving vortex center portion is carried out UNICOM, in above-mentioned path, restriction is set, with at volume of the cooling medium as the above-mentioned working fluid that sucks, with more than or equal to 2 weight % but less than the ratio of 20 weight %, to above-mentioned expansion chamber supplying lubricating oil.
The scroll expander that technological scheme of the present invention 2 is related, comprise expansion mechanism portion, this expansion mechanism portion makes decide vortex and the moving vortex that erect the vortex shape scroll wraps from end plate nibble to be incorporated in and form expansion chamber between the both sides, and make above-mentioned moving vortex move the suction of carrying out working fluid by above-mentioned expansion chamber while changing volume when circular orbit rotates under the rotation controlled conditions according to the rotation control mechanism, expand, discharge, it is characterized in that, on the end plate back side of the scrollwork back of above-mentioned moving vortex side, be provided with the sealed member that central part and peripheral part are separated, to supply to above-mentioned end plate back side central part by the lubricant oil that suction pressure kept, to supply to above-mentioned end plate back side peripheral part by the lubricant oil that pressure kept lower but higher than head pressure than suction pressure, and, on the end plate of above-mentioned moving vortex, be provided with the path that the scroll wraps bottom surface of above-mentioned end plate back side central part and above-mentioned moving vortex center portion is carried out UNICOM.
The scroll expander that technological scheme of the present invention 3 is related, comprise expansion mechanism portion, this expansion mechanism portion makes decide vortex and the moving vortex that erect the vortex shape scroll wraps from end plate nibble to be incorporated in and form expansion chamber between the both sides, and make above-mentioned moving vortex move the suction of carrying out working fluid by above-mentioned expansion chamber while changing volume when circular orbit rotates under the rotation controlled conditions according to the rotation control mechanism, expand, discharge, it is characterized in that, to supply to by the lubricant oil that suction pressure kept on the end plate back side of scrollwork back side of above-mentioned moving vortex, on the scrollwork front end of above-mentioned moving vortex, formed the diaphragm seal holding tank, be used to store diaphragm seal, on the end plate of above-mentioned moving vortex, be provided with the path that the bottom surface of the above-mentioned end plate back side and above-mentioned diaphragm seal holding tank is carried out UNICOM.
The scroll expander that technological scheme of the present invention 4 is related, comprise expansion mechanism portion, this expansion mechanism portion makes decide vortex and the moving vortex that erect the vortex shape scroll wraps from end plate nibble to be incorporated in and form expansion chamber between the both sides, and make above-mentioned moving vortex move the suction of carrying out working fluid by above-mentioned expansion chamber while changing volume when circular orbit rotates under the rotation controlled conditions according to the rotation control mechanism, expand, discharge, it is characterized in that, on the end plate back side of the scrollwork back of above-mentioned moving vortex side, be provided with the sealed member that central part and peripheral part are separated, to supply to above-mentioned end plate back side central part by the lubricant oil that suction pressure kept, to supply to above-mentioned end plate back side peripheral part by the lubricant oil that pressure kept lower but higher than head pressure than suction pressure, and, on the scrollwork front end of above-mentioned moving vortex, formed the diaphragm seal holding tank, be used to store diaphragm seal, on the end plate of above-mentioned moving vortex, be provided with the path that the bottom surface of above-mentioned end plate back side central part and above-mentioned diaphragm seal holding tank is carried out UNICOM.
The scroll expander that technological scheme of the present invention 5 is related on the basis of the 1st or the 2nd technological scheme, is characterized in that: on above-mentioned path and the scroll wraps inwall side that is formed on above-mentioned moving vortex and the above-mentioned expansion chamber after the sealing just link.
The scroll expander that technological scheme of the present invention 6 is related on the basis of the 1st or the 2nd technological scheme, is characterized in that: on above-mentioned path and the scroll wraps outer wall side that is formed on above-mentioned moving vortex and the above-mentioned expansion chamber after the sealing just link.
The scroll expander that technological scheme of the present invention 7 is related, on the basis of the 1st or the 2nd technological scheme, it is characterized in that: as above-mentioned path, be provided with the 1st path and the 2nd path, the 1st path be formed on the scroll wraps inwall side of above-mentioned moving vortex and sealing just after the 1st above-mentioned expansion chamber link, on the 2nd path and the scroll wraps outer wall side that is formed on above-mentioned moving vortex and the 2nd above-mentioned expansion chamber after the sealing just link.
The scroll expander that technological scheme of the present invention 8 is related, on the basis of the 3rd or the 4th technological scheme, it is characterized in that: except above-mentioned path, also be provided with the 1st path, above-mentioned the 1st path be formed on the scroll wraps inwall side of above-mentioned moving vortex and sealing just after above-mentioned expansion chamber link.
The scroll expander that technological scheme of the present invention 9 is related, on the basis of the 3rd or the 4th technological scheme, it is characterized in that: except above-mentioned path, also be provided with the 2nd path, above-mentioned the 2nd path be formed on the scroll wraps outer wall side of above-mentioned moving vortex and sealing just after above-mentioned expansion chamber link.
The scroll expander that technological scheme of the present invention 10 is related, on the basis of the 3rd or the 4th technological scheme, it is characterized in that: except above-mentioned path, be provided with the 1st path and the 2nd path, above-mentioned the 1st path be formed on the scroll wraps inwall side of above-mentioned moving vortex and sealing just after the 1st above-mentioned expansion chamber link, on above-mentioned the 2nd path and the scroll wraps outer wall side that is formed on above-mentioned moving vortex and the 2nd above-mentioned expansion chamber after the sealing just link.
The scroll expander that technological scheme of the present invention 11 is related, on the basis of the 2nd～the 4th technological scheme, it is characterized in that: in above-mentioned path, restriction is set, with at volume of the cooling medium as the above-mentioned working fluid that sucks, with more than or equal to 2 weight % but less than the ratio of 20 weight %, to above-mentioned expansion chamber supplying lubricating oil.
The scroll expander that technological scheme of the present invention 12 is related, on the basis of the 1st～the 4th technological scheme, it is characterized in that: the refrigeration agent as above-mentioned working fluid is a high-pressure refrigerant, for example is carbon dioxide.
The invention effect
Scroll expander of the present invention can be lubricated the slide part of deciding vortex and moving vortex reliably, and prevents that suction efficiency from descending.Particularly when using high-pressure and low-pressure to contract to be carbon dioxide coolant, can realize high efficiency than refrigeration agent.
Description of drawings
Fig. 1 is the sectional view of the scroll expander in the expression embodiment of the invention 1;
Fig. 2 is the stereogram of the moving vortex of expression scroll expander shown in Figure 1;
Fig. 3 is the stereogram of the moving vortex of the expression embodiment of the invention 2 mesoscale eddies decompressors;
Fig. 4 is closed process is carried out in expression to the refrigeration agent of the embodiment of the invention 3 mesoscale eddies decompressors a explanatory drawing (state after the sealing just);
Fig. 5 is closed process is carried out in expression to the refrigeration agent of the embodiment of the invention 3 mesoscale eddies decompressors a explanatory drawing (having rotated 30 ° state after the firm sealing);
Fig. 6 is closed process is carried out in expression to the refrigeration agent of the embodiment of the invention 3 mesoscale eddies decompressors a explanatory drawing (having rotated 60 ° state after the firm sealing);
Fig. 7 is closed process is carried out in expression to the refrigeration agent of the embodiment of the invention 4 mesoscale eddies decompressors a explanatory drawing (state after the sealing just);
Fig. 8 is closed process is carried out in expression to the refrigeration agent of the embodiment of the invention 4 mesoscale eddies decompressors a explanatory drawing (having rotated 30 ° state after the firm sealing);
Fig. 9 is closed process is carried out in expression to the refrigeration agent of the embodiment of the invention 4 mesoscale eddies decompressors a explanatory drawing (having rotated 60 ° state after the firm sealing);
Figure 10 represents that efficiency of expander is with respect to the performance plot of the lubricant oil delivery volume of the expansion chamber of scroll expander in the embodiment of the invention 5;
Figure 11 is the performance plot of the best supply ratio of the circulating mass of refrigerant of lubricant oil and scroll expander in the expression embodiment of the invention 5;
Figure 12 is the simple sectional view of existing scroll expander.
Embodiment
The scroll expander that meets the present invention's the 1st example will be supplied to the end plate back side of the scrollwork back side of above-mentioned moving vortex by the lubricant oil that suction pressure kept, and be provided with the path that the scroll wraps bottom surface of the above-mentioned end plate back side and above-mentioned moving vortex center portion is carried out UNICOM on the end plate of above-mentioned moving vortex.According to this example, because lubricant oil is fed in the suction portion of expansion chamber, be accompanied by inflation process, in order the slide part of deciding vortex and moving vortex is lubricated, thereby can provides reliability high scroll expander.
The scroll expander that meets the present invention's the 2nd example is a kind of like this scroll expander, promptly, on the end plate back side of the scrollwork back of above-mentioned moving vortex side, be provided with the sealed member that central part and peripheral part are separated, to supply to end plate back side central part by the lubricant oil that suction pressure kept, to supply to end plate back side peripheral part by the lubricant oil that pressure kept lower but higher than head pressure than suction pressure, and, on the end plate of above-mentioned moving vortex, be provided with the path that the scroll wraps bottom surface of above-mentioned end plate back side central part and above-mentioned moving vortex center portion is carried out UNICOM.According to this example, particularly under the big occasion of expansion ratio, do not push deciding vortex owing to move vortex, thereby can provide reliability high scroll expander with excessive pressure.
The scroll expander that meets the present invention's the 3rd example is a kind of like this scroll expander, promptly, to supply to the end plate back side of the scrollwork back side of above-mentioned moving vortex by the lubricant oil that suction pressure kept, on the scrollwork front end of above-mentioned moving vortex, formed the diaphragm seal holding tank, be used to store diaphragm seal, the path of UNICOM is carried out in the bottom surface that is provided with opposite end backboard face and diaphragm seal holding tank on the end plate of above-mentioned moving vortex.According to this example, owing to can be full of the gap of diaphragm seal holding tank and diaphragm seal by lubricant oil, thereby the refrigeration agent that leaks with respect to the effusion scroll wraps, improved sealing, high performance scroll expander can be provided.And, in order the slide part of deciding vortex and moving vortex is lubricated, thereby can provides reliability high scroll expander because lubricant oil by the gap of diaphragm seal holding tank and diaphragm seal, is accompanied by inflation process.
The scroll expander that meets the present invention's the 4th example is a kind of like this scroll expander, promptly, on the end plate back side of the scrollwork back side of moving vortex, be provided with the sealed member that central part and peripheral part are separated, to supply to end plate back side central part by the lubricant oil that suction pressure kept, to supply to end plate back side peripheral part by the lubricant oil that pressure kept lower but higher than head pressure than suction pressure, and, on the scrollwork front end of moving vortex, formed the diaphragm seal holding tank, be used to store diaphragm seal, the path of UNICOM is carried out in the bottom surface that is provided with opposite end backboard face central part and diaphragm seal holding tank on the end plate of above-mentioned moving vortex.According to this example, particularly under the big occasion of expansion ratio, do not push deciding vortex owing to move vortex, thereby can provide reliability higher scroll expander with excessive pressure.
The present invention's the 5th example is in the scroll expander that meets the 1st or the 2nd example, on path and the scroll wraps inwall side that is formed on moving vortex and the above-mentioned expansion chamber after the sealing just link.According to this example, when particularly the temperature of expansion mechanism portion raises under low-load, the moving vortex that constitutes the expansion chamber of the scroll wraps inwall side that is formed at moving vortex can broaden because of thermal expansion with the space of deciding the contacting part of scroll wrap portion, but under this occasion, the lubricant oil that is injected in the expansion chamber will still can improve sealing, can provide performance higher scroll expander.
The present invention's the 6th example is in the scroll expander that meets the 1st or the 2nd example, on path and the scroll wraps outer wall side that is formed on moving vortex and the above-mentioned expansion chamber after the sealing just link.According to this example, when particularly the temperature of expansion mechanism portion descends under excess load, the moving vortex that constitutes the expansion chamber of the scroll wraps outer wall side that is formed at moving vortex can broaden because of thermal shrinkage with the space of deciding the contacting part of scroll wrap portion, but under this occasion, the lubricant oil that is injected in the expansion chamber still can improve sealing, can provide performance higher scroll expander.
The present invention's the 7th example is in the scroll expander that meets the 1st or the 2nd example, as above-mentioned path, be provided with the 1st path and the 2nd path, the 1st path be formed on the scroll wraps inwall side of above-mentioned moving vortex and sealing just after the 1st expansion chamber link, on the 2nd path and the scroll wraps outer wall side that is formed on above-mentioned moving vortex and the 2nd expansion chamber after the sealing just link.According to this example, even when the temperature of expansion mechanism portion raises under low-load, or when the temperature of expansion mechanism portion descended under excess load, the lubricant oil that is injected in the expansion chamber also can improve sealing, can provide performance higher scroll expander.
The present invention's the 8th example is in the scroll expander that meets the 3rd or the 4th example, except above-mentioned path, also be provided with the 1st path, above-mentioned the 1st path be formed on the scroll wraps inwall side of above-mentioned moving vortex and sealing just after above-mentioned expansion chamber link.According to this example, not only the refrigeration agent of effusion scroll wraps can be leaked, when also particularly the temperature of expansion mechanism portion raises under low-load, the moving vortex that constitutes the expansion chamber of the scroll wraps inwall side that is formed at moving vortex can broaden because of thermal expansion with the space of deciding the contacting part of scroll wrap portion, under this occasion, the lubricant oil that is injected in the expansion chamber will still can improve sealing, can provide performance higher scroll expander.
The present invention's the 9th example is in the scroll expander that meets the 3rd or the 4th example, except above-mentioned path, also be provided with the 2nd path, above-mentioned the 2nd path be formed on the scroll wraps outer wall side of above-mentioned moving vortex and sealing just after above-mentioned expansion chamber link.According to this example, not only the refrigeration agent of effusion scroll wraps can be leaked, when also particularly the temperature of expansion mechanism portion descends under excess load, the moving vortex that constitutes the expansion chamber of the scroll wraps outer wall side that is formed at moving vortex can broaden because of thermal shrinkage with the contacting part space of deciding the scroll wraps of vortex, under this occasion, the lubricant oil that is injected in the expansion chamber will still can improve sealing, can provide performance higher scroll expander.
The present invention's the 10th example is in the scroll expander that meets the 3rd or the 4th example, except above-mentioned path, be provided with the 1st path and the 2nd path, above-mentioned the 1st path be formed on the scroll wraps inwall side of above-mentioned moving vortex and sealing just after the 1st expansion chamber link, on above-mentioned the 2nd path and the scroll wraps outer wall side that is formed on above-mentioned moving vortex and the 2nd expansion chamber after the sealing just link.According to this example, not only the refrigeration agent of effusion scroll wraps can be leaked, in the time of can also raising in the temperature of expansion mechanism portion under the low-load, when the temperature of expansion mechanism portion descends under excess load, improve sealing by the lubricant oil that is injected in the expansion chamber, thereby can provide performance higher scroll expander.
The present invention's the 11st example is in the scroll expander that meets the 1st～the 4th example, at amount as the refrigeration agent of the above-mentioned working fluid that is inhaled into, with more than or equal to 2 weight % but less than the ratio of 20 weight %, to above-mentioned expansion chamber supplying lubricating oil, in above-mentioned path, restriction is set.According to this example, when improving suction efficiency, also improved sealing, can provide performance higher scroll expander.
The present invention's the 12nd example is in the scroll expander that meets the 1st～the 4th example, is high-pressure refrigerant as the refrigeration agent of above-mentioned working fluid, for example is carbon dioxide.According to this example, owing to compare with the freon series coolant, theoretical recovery power is big in inflation process, thereby can further improve cycle efficiency.And owing to compare with the freon series coolant, carbon dioxide coolant pressure reduction is big, thereby sealing is further improved, and can provide performance higher scroll expander.
(embodiment 1)
Hereinafter will be introduced embodiments of the invention with reference to the accompanying drawings.The present invention is not limited to this embodiment's record.
Fig. 1 is the sectional view of the scroll expander in the expression embodiment of the invention 1.
The moving vortex 13 that scroll expander in the present embodiment will and be decided vortex 12 engagement be clamped in main bearing parts 11 with by bolton deciding between the vortex 12 on these main bearing parts 11,11 pairs of main bearing parts support by the main shaft part 4a that modes such as welding or shrink fit are fixed on the interior crankshaft 4 of seal container 1.The Othemos ring rotation control mechanisms 14 such as (オ Le ダ system リ Application グ) that the mode that is provided with anti-stop vortex 13 rotations and moves with circular orbit between moving vortex 13 and main bearing parts 11 leads.
In said structure,, make vortex 13 carry out the circular orbit motion by moving vortex 13 being carried out eccentric drive by the eccentric axial portion 4b that is positioned at crankshaft 4 upper ends.By this motion, enlarge to the periphery side shifting from central part on one side on one side be formed on the expansion chamber of deciding between vortex 12 and the moving vortex 13 15.Utilize this variation, the suction pipe 16 outside leading to seal container 1 sucks refrigeration agents and makes its expansion with the suction port of deciding vortex 12 central parts 17.The following refrigerant gas of authorized pressure is discharged to outside the seal container 1 from the exhaust port 18 of deciding vortex 12 outer circumferential sides.
The lower end side of crankshaft 4 is supported by supplementary bearing parts 21, has disposed positive displacement pump 25 in the lower end of crankshaft 4.Lubricant oil 6 is drawn up from lubricating oil bath 20 by positive displacement pump 25, through being arranged on the fuel supply path (not shown) of crankshaft 4 axial centre, to supply to by the lubricant oil 6 that suction pressure kept on the end plate back side, the 11a of main bearing portion and the 11b of capacity eccentric bearing portion are lubricated and cool off.Pass through lubricant oil return aperture 26 then, return lubricant oil 20, carry out recirculation.
On the other hand, a part that has arrived the lubricant oil 6 of the 11b of capacity eccentric bearing portion is reduced pressure by the throttling path 28 that is arranged on moving vortex 13 inside, supplies to back pressure chamber 29.And, on the end plate back side of the scrollwork back side of moving vortex 13, be provided with the sealed member 5 that central part and peripheral part are separated.Sealed member 5 will arrive the pressure of lubricant oil 6 of the 11b of capacity eccentric bearing portion and the pressure of back pressure chamber 29 separates.
Along with being fed to accumulating of lubricant oil 6 in the back pressure chamber 29, the pressure of back pressure chamber 29 raises.In order to keep this constant pressure, be provided with back pressure regulating mechanism 9.In case the pressure height that the pressure ratio of back pressure chamber 29 sets, then back pressure regulating mechanism 9 work, with the lubricant oil 6 of back pressure chamber 29 outside refrigeration agent is discharged to seal container 1.By the work of this back pressure regulating mechanism 29, particularly when expansion ratio is big, do not push deciding vortex 12 owing to move vortex 13, so can provide reliability high scroll expander with excessive pressure.
Fig. 2 is the stereogram of the moving vortex of expression scroll expander shown in Figure 1.
In Fig. 2, on the end plate 13a of moving vortex 13 is to have formed vortex shape scroll wraps 13c on the 13b of scroll wraps bottom surface, and has formed the path 30 that the scroll wraps bottom surface 13b of the end plate back side 13d of the scrollwork back side of moving vortex 13 and moving vortex 13 central parts is carried out UNICOM on end plate 13a.
By this structure, lubricant oil 6 is fed in the suction portion of expansion chamber 15, is accompanied by inflation process, in order the slide part of deciding vortex 12 and moving vortex 13 is lubricated.Thereby can provide reliability high scroll expander.
Sealed member 5 (not shown) that central part and peripheral part are separated also can be set on the end plate back side 13d of the scrollwork back side of moving vortex 13, at this moment, since simple in structure, can reduce manufacturing procedure, thereby can provide cost lower scroll expander.
(embodiment 2)
Fig. 3 is the stereogram of the moving vortex of the expression embodiment of the invention 2 mesoscale eddies decompressors.
This embodiment's scroll expander has formed diaphragm seal holding tank 32 on the scroll wraps 13c front end of moving vortex 13, be used to store diaphragm seal 31.On end plate 13a, formed the path 33 that bottom surface and end plate back side 13d to diaphragm seal holding tank 32 carry out UNICOM.
By this structure, can be full of the gap of diaphragm seal holding tank 32 and diaphragm seal 31 by lubricant oil 6, thereby improve the sealing of the refrigeration agent that effusion scroll wraps 13c is leaked, high performance scroll expander is provided.
In addition, because lubricant oil 6 is accompanied by inflation process by the gap of diaphragm seal holding tank 32 and diaphragm seal 31, in order the slide part of deciding vortex 12 and moving vortex 13 is lubricated, thereby can provides reliability high scroll expander.
Sealed member 5 (not shown) that central part and peripheral part are separated also can be set on the side end panel back side, the scrollwork back 13d of moving vortex 13, at this moment, since simple in structure, can reduce manufacturing procedure, thereby can provide cost lower scroll expander.
(embodiment 3)
Fig. 4～Fig. 6 is the expression embodiment of the invention 3 mesoscale eddies decompressors carry out closed process to refrigeration agent a explanatory drawing.Rotation angle according to crankshaft illustrates the process that two scroll wraps are sealed refrigeration agent.Here, the 1st path 30a represents to be arranged on the position on the end plate 13a of moving vortex 13 not shown in the figures.
Fig. 4 shows the moment that forms the 1st expansion chamber 15a.Just show:, form the state (state after the sealing just) of the 1st expansion chamber 15a by the scroll wraps 13c inwall side and the contacting part 34 that contacting of the scroll wraps 12c outer wall side of deciding vortex 12 produces of moving vortex 13.
Fig. 5 and Fig. 6 show that the state of the 1st expansion chamber 15a sequential inflation by the left-handed rotation of moving vortex 13 (has rotated 30 ° state after the firm sealing; Rotated 60 ° state after the firm sealing).
In the scroll expander of present embodiment, when the scroll wraps 13c inwall side of moving vortex 13 has formed the 1st expansion chamber 15a that finishes the refrigeration agent sealing, the 1st path 30a just and the 1st expansion chamber 15a link.
By forming the 1st path 30a, when particularly the temperature of expansion mechanism portion raises under low-load, the space that constitutes contacting part 34 parts the 1st expansion chamber 15a, scroll wraps 12c and scroll wraps 13c is owing to thermal expansion broadens, but under this occasion, the lubricant oil 6 that is injected in the 1st expansion chamber 15a plays the effect that improves sealing.By this effect, can provide performance higher scroll expander.
In addition, by the 1st path 30a, along with the expansion of the 1st expansion chamber 15a, lubricant oil 6 injects the 1st expansion chamber 15a, in a single day when still turning to angle shown in Figure 6, then the 1st path 30a is by the scroll wraps 12c obturation of deciding vortex 12.Thereby lubricant oil 6 can not exceedingly be flowed in the 1st expansion chamber 15a.
Be arranged on the moving vortex of the scroll expander in embodiment illustrated in fig. 32 by the 1st path 30a present embodiment, not only the refrigeration agent of effusion scroll wraps can be leaked, when also particularly the temperature of expansion mechanism portion raises under low-load, although constituting the moving vortex of the expansion chamber on the scroll wraps inwall side that is formed at moving vortex and the space of the contacting part of the scroll wraps of deciding vortex can broaden, but the lubricant oil that is injected in the expansion chamber still can improve sealing, thereby can provide performance higher scroll expander.
(embodiment 4)
Fig. 7～Fig. 9 is the expression embodiment of the invention 4 mesoscale eddies decompressors carry out closed process to refrigeration agent a explanatory drawing.Illustrate two scroll wraps according to the rotation angle of crankshaft refrigeration agent is carried out closed process.At this moment, the 2nd path 30b represents to be arranged on the position on the end plate 13a of moving vortex 13 not shown in the figures.
Fig. 7 shows the moment that has formed the 2nd expansion chamber 15b.Just show:, form the state of the 2nd expansion chamber 15b by the contacting part 34 that the scroll wraps 13c outer wall side that moves vortex 13 produces with the contacting of scroll wraps 12c inwall side of deciding vortex 12.
Fig. 8 and Fig. 9 show the 2nd expansion chamber 15b by the left-handed rotation of moving vortex 13 state of sequential inflation.
In the scroll expander of present embodiment, when the scroll wraps 13c outer wall side of moving vortex 13 had formed the 2nd expansion chamber 15b that finishes the refrigeration agent sealing, the 2nd path 30b and the 2nd expansion chamber 15b linked.
By forming the 2nd path 30b, when particularly the temperature of expansion mechanism portion descends under excess load, the space that constitutes contacting part 34 parts of the scroll wraps 12c of the 2nd expansion chamber 15b and scroll wraps 13c broadens because of thermal shrinkage, but under this occasion, the lubricant oil 6 that is injected in the 2nd expansion chamber 15b plays the effect that improves sealing.By this effect, can provide performance higher scroll expander.
By the 2nd path 30b, along with the expansion of the 2nd expansion chamber 15b, lubricant oil 6 injects the 2nd expansion chamber 15b, in a single day when still turning to angle shown in Figure 9, then the 2nd path 30b is by the scroll wraps 12c obturation of deciding vortex 12.Thereby make lubricant oil 6 can not exceed in needs ground inflow the 2nd expansion chamber 15b.
Also can form the 1st path 30a and two paths of the 2nd path 30b simultaneously, wherein the 1st path 30a when the scroll wraps 13c inwall side of moving vortex 13 has formed the 1st expansion chamber 15a that finishes the refrigeration agent sealing and the 1st expansion chamber 15a link, the 2nd path 30b when the scroll wraps 13c outer wall side of moving vortex 13 has formed the 2nd expansion chamber 15b that finishes the refrigeration agent sealing and the 2nd expansion chamber 15b link.And can form many paths with respect to 1 expansion chamber.
By this structure, when the temperature of expansion mechanism portion raises under low-load, or when expansion mechanism portion temperature descends under excess load, all can control subtly the injection of lubricant oil, thereby improve the sealing of the lubricant oil that injects, can provide performance higher scroll expander.
Be arranged on the moving vortex of the scroll expander in embodiment illustrated in fig. 32 by the 2nd path 30b present embodiment, not only the refrigeration agent of effusion scroll wraps can be leaked, but also can be particularly when the temperature of expansion mechanism portion descends under excess load, although constituting the space of the contacting part of the scroll wraps that is formed at the moving vortex that moves the expansion chamber on the scroll wrap portion outer wall side and decides vortex can broaden, but the lubricant oil that is injected in the expansion chamber still can improve sealing, thereby can provide performance higher scroll expander.
And, by the 1st path 30a of the foregoing description and the 2nd path 30b of present embodiment are arranged on the moving vortex of the scroll expander in embodiment illustrated in fig. 32, not only the refrigeration agent of effusion scroll wraps can be leaked, and when the temperature of expansion mechanism portion raises under low-load, or when the temperature of expansion mechanism portion descends under excess load, the lubricant oil that is injected in the expansion chamber can improve sealing, thereby can provide performance higher scroll expander.
(embodiment 5)
Figure 10 represents that efficiency of expander is with respect to the performance plot of the lubricant oil delivery volume of the expansion chamber of scroll expander in the embodiment of the invention 5.
As shown in the figure, even condition 1, condition 2, condition 3, condition 4 are changed with operating conditions,, also exist efficient to become the supply ratio of maximum lubricant oil 6 at these conditions.If just to expansion chamber 15 supplying lubricating oils 6, then the refrigeration agent sealing improves, if overfeeding lubricant oil, then lubricant oil 6 becomes big with the ratio that sucks volume, thereby suction efficiency descends.
Figure 11 is the performance plot that the best of the circulating mass of refrigerant of the relative scroll expander of lubricant oil in the expression embodiment of the invention 5 is supplied with ratio.
As shown in the figure, if with more than or equal to 2 weight % but less than the ratio of 20 weight %,, then can improve suction efficiency and sealing is improved, thereby can provide performance higher scroll expander to expansion chamber 15 supplying lubricating oils 6.For example by the restriction dwindle internal diameter etc. is set in path, just can realize more than or equal to 2 weight % still less than the supply ratio (not shown) of 20 weight %.
Refrigeration agent as working fluid can use high-pressure refrigerant, carbon dioxide for example, owing to compare with the freon series coolant, theoretical in inflation process to reclaim power big, thereby by making the decompressor high efficiency, can further improve cycle efficiency.And owing to compare with the freon series coolant, the carbon dioxide coolant differential pressure is big, thereby sealing is improved, and by using carbon dioxide coolant in the present invention, can provide performance higher scroll expander.
As mentioned above, scroll expander according to the invention will be supplied to by the lubricant oil that suction pressure kept on the end plate back side of scrollwork back side of moving vortex, and the path of UNICOM is carried out in the scroll wraps bottom surface that is provided with opposite end backboard face and moving vortex center portion on end plate.By this structure, lubricant oil is fed to suction portion, along with inflation process, in order the slide part of deciding vortex and moving vortex is lubricated, thereby can provides reliability high scroll expander.And working fluid is not limited to refrigeration agent, also can be applied in in air, the scroll expander or scroll fluid machine of helium as working fluid.
Claims (6)
1. scroll expander, comprise expansion mechanism portion, this expansion mechanism portion makes decide vortex and the moving vortex that erect the vortex shape scroll wraps from end plate nibble to be incorporated in and form expansion chamber between the both sides, and make above-mentioned moving vortex move suction, expansion, the discharge of carrying out working fluid by above-mentioned expansion chamber while changing volume when circular orbit rotates under the rotation controlled conditions according to the rotation control mechanism, it is characterized in that
On the end plate back side of the scrollwork back of above-mentioned moving vortex side, be provided with the sealed member that central part and peripheral part are separated, to supply to above-mentioned end plate back side central part by the lubricant oil that suction pressure kept, to supply to above-mentioned end plate back side peripheral part by the lubricant oil that pressure kept lower but higher than head pressure than suction pressure, and, on the end plate of above-mentioned moving vortex, be provided with the path that the scroll wraps bottom surface of above-mentioned end plate back side central part and above-mentioned moving vortex center portion is carried out UNICOM.
2. according to the scroll expander of claim 1 record, it is characterized in that: on above-mentioned path and the scroll wraps inwall side that is formed on above-mentioned moving vortex and the above-mentioned expansion chamber after the sealing just link.
3. according to the scroll expander of claim 1 record, it is characterized in that: on above-mentioned path and the scroll wraps outer wall side that is formed on above-mentioned moving vortex and the above-mentioned expansion chamber after the sealing just link.
4. according to the scroll expander of claim 1 record, it is characterized in that: as above-mentioned path, be provided with the 1st path and the 2nd path, the 1st path be formed on the scroll wraps inwall side of above-mentioned moving vortex and sealing just after the 1st above-mentioned expansion chamber link, on the 2nd path and the scroll wraps outer wall side that is formed on above-mentioned moving vortex and the 2nd above-mentioned expansion chamber after the sealing just link.
5. according to the scroll expander of claim 1 record, it is characterized in that: in above-mentioned path, restriction is set, with at volume of the cooling medium, with more than or equal to 2 weight % but less than the ratio of 20 weight %, to above-mentioned expansion chamber supplying lubricating oil as the above-mentioned working fluid that sucks.
6. according to the scroll expander of claim 1 record, it is characterized in that: the refrigeration agent as above-mentioned working fluid is a carbon dioxide.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-131982 | 2005-04-28 | ||
| JP2005131982A JP2006307753A (en) | 2005-04-28 | 2005-04-28 | Scroll expander |
| CN2006100996338A CN1869448B (en) | 2005-04-28 | 2006-04-28 | Vortex expansion engine |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100996338A Division CN1869448B (en) | 2005-04-28 | 2006-04-28 | Vortex expansion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101713300A true CN101713300A (en) | 2010-05-26 |
| CN101713300B CN101713300B (en) | 2015-07-08 |
Family
ID=37443195
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910252649.1A Expired - Fee Related CN101713300B (en) | 2005-04-28 | 2006-04-28 | Scroll expander |
| CN2006100996338A Expired - Fee Related CN1869448B (en) | 2005-04-28 | 2006-04-28 | Vortex expansion engine |
| CN200910252648.7A Expired - Fee Related CN101713299B (en) | 2005-04-28 | 2006-04-28 | Scroll expander |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100996338A Expired - Fee Related CN1869448B (en) | 2005-04-28 | 2006-04-28 | Vortex expansion engine |
| CN200910252648.7A Expired - Fee Related CN101713299B (en) | 2005-04-28 | 2006-04-28 | Scroll expander |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006307753A (en) |
| CN (3) | CN101713300B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673082A (en) * | 2016-01-19 | 2016-06-15 | 上海理工大学 | Scroll expander for micro-organic rankine cycle |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009002221A (en) * | 2007-06-21 | 2009-01-08 | Panasonic Corp | Scroll expander |
| CN102950054A (en) * | 2011-08-31 | 2013-03-06 | 河南雷利矿山机械有限公司 | Low-temperature crushing vortex expansion-type medicine crushing |
| CN107956514B (en) * | 2017-12-02 | 2024-06-25 | 湖南省黑玛食品有限公司 | Expansion ratio adjustable rotary vane expander |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0828461A (en) * | 1994-07-11 | 1996-01-30 | Toshiba Corp | Scroll expander |
| CN1459572A (en) * | 2002-05-24 | 2003-12-03 | 松下电器产业株式会社 | Vortex compressor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5685087A (en) * | 1979-12-10 | 1981-07-10 | Hiroshi Watanabe | Enlarged auger head for core drilling method |
| JPH05256276A (en) * | 1992-03-12 | 1993-10-05 | Daikin Ind Ltd | Scroll type fluid machine |
| JP3624501B2 (en) * | 1995-12-06 | 2005-03-02 | 松下電器産業株式会社 | Scroll compressor |
| JP2002227778A (en) * | 2001-02-06 | 2002-08-14 | Hitachi Ltd | Scroll fluid machinery |
| JP4104047B2 (en) * | 2001-05-18 | 2008-06-18 | 松下電器産業株式会社 | Scroll compressor |
-
2005
- 2005-04-28 JP JP2005131982A patent/JP2006307753A/en active Pending
-
2006
- 2006-04-28 CN CN200910252649.1A patent/CN101713300B/en not_active Expired - Fee Related
- 2006-04-28 CN CN2006100996338A patent/CN1869448B/en not_active Expired - Fee Related
- 2006-04-28 CN CN200910252648.7A patent/CN101713299B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0828461A (en) * | 1994-07-11 | 1996-01-30 | Toshiba Corp | Scroll expander |
| CN1459572A (en) * | 2002-05-24 | 2003-12-03 | 松下电器产业株式会社 | Vortex compressor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673082A (en) * | 2016-01-19 | 2016-06-15 | 上海理工大学 | Scroll expander for micro-organic rankine cycle |
| CN105673082B (en) * | 2016-01-19 | 2018-01-26 | 上海理工大学 | Miniature organic Rankine bottoming cycle scroll expander |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101713299A (en) | 2010-05-26 |
| CN101713299B (en) | 2014-12-24 |
| CN101713300B (en) | 2015-07-08 |
| CN1869448A (en) | 2006-11-29 |
| JP2006307753A (en) | 2006-11-09 |
| CN1869448B (en) | 2010-06-23 |
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