CN101713300B - Scroll expander - Google Patents
Scroll expander Download PDFInfo
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- CN101713300B CN101713300B CN200910252649.1A CN200910252649A CN101713300B CN 101713300 B CN101713300 B CN 101713300B CN 200910252649 A CN200910252649 A CN 200910252649A CN 101713300 B CN101713300 B CN 101713300B
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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
The application is the divisional application that Panasonic Electric Equipment Industrial Co., Ltd submits to, application number is 200610099633.8, the applying date is the application for a patent for invention on April 28th, 2006.
Technical field
The present invention relates to a kind of scroll expander, by making to determine vortex and the engagement of dynamic vortex, form expansion chamber between the two parties, when controlling to make vortex rotation according to the rotation of rotation control mechanism, expansion chamber changes while volume and moves, thus carries out the suction of working fluid, exapnsion, discharge.
Background technique
All the time in this scroll expander, in order to lubricate the slip surface determining vortex and dynamic vortex, by oil feed pump the lubricant oil be stored in bottom sealed case be drawn up and supplying.But due to when manufacturing oil feed pump, complicated cutting etc. must be needed, thus there is the problem causing cost to increase.For this problem, disclose a kind of following technology (such as referenced patent document 1) can reliably lubricated by inexpensive construction like that.
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 determined, on vortex 41, to be directed in expansion chamber 43 by the working fluid in sealed case 42.One end of lubricant oil suction pipe 46 is connected with working fluid ingress pipe 44, and the other end is immersed in the lubricant oil 45 that is stored in bottom sealed case 42.According to Bernoulli's therem, by the refrigeration agent flowed into from working fluid ingress pipe 44 in expansion chamber 43, the lubricant oil 45 be stored in bottom sealed case 42 is drawn up come.
Patent documentation 1: Japanese Unexamined Patent Publication 2003-166402 publication
But, in order to lubricate sliding position, such as bearing or the rotation control mechanism outside the slide part determining vortex and dynamic vortex, other oil feed pump etc. must be set.
And, when carrying out fuel feeding according to Bernoulli's therem, due to by from working fluid ingress pipe, lubricant oil draws up by the refrigeration agent flowed in expansion chamber, so when the refrigerant flow flowed into is many, lubricant oil can be sucked in a large number, therefore there is the problem that suction efficiency is low.
Summary of the invention
Thus the object of the invention is to solve the problem, provide a kind of and can be lubricated slide part by simple structure, and the scroll expander that suction efficiency can be prevented low.
Scroll expander involved by technological scheme 1 of the present invention, comprise expansion mechanism portion, this expansion mechanism portion make from end plate erect vortex shape scroll wraps determine vortex and dynamic vortex engagement and form expansion chamber between the two parties, and according to changing volume by above-mentioned expansion chamber when making above-mentioned dynamic vortex rotate along circular orbit under the rotation controlled conditions of rotation control mechanism while move and carry out the suction of working fluid, expand, discharge, it is characterized in that, the lubricant oil kept by suction pressure is supplied on the end plate back side of the side, scrollwork back of above-mentioned dynamic vortex, the end plate of above-mentioned dynamic vortex is provided with the path scroll wraps bottom surface in the above-mentioned end plate back side and above-mentioned dynamic vortex center portion being carried out to UNICOM, in above-mentioned path, restriction is set, using the volume of the cooling medium for the above-mentioned working fluid as suction, with be more than or equal to 2 % by weight but be less than 20 % by weight ratio, to above-mentioned expansion chamber supplying lubricating oil.
Scroll expander involved by technological scheme 2 of the present invention, comprise expansion mechanism portion, this expansion mechanism portion make from end plate erect vortex shape scroll wraps determine vortex and dynamic vortex engagement and form expansion chamber between the two parties, and according to changing volume by above-mentioned expansion chamber when making above-mentioned dynamic vortex rotate along circular orbit under the rotation controlled conditions of rotation control mechanism while move and carry out the suction of working fluid, expand, discharge, it is characterized in that, on the end plate back side of the side, scrollwork back of above-mentioned dynamic vortex, be provided with sealed member central part and peripheral part separated, the lubricant oil kept by suction pressure is supplied to above-mentioned end plate back side central part, the lubricant oil kept by lower than suction pressure but higher than head pressure pressure is supplied to above-mentioned end plate back side peripheral part, and, the end plate of above-mentioned dynamic vortex is provided with the path scroll wraps bottom surface in above-mentioned end plate back side central part and above-mentioned dynamic vortex center portion being carried out to UNICOM.
Scroll expander involved by technological scheme 3 of the present invention, comprise expansion mechanism portion, this expansion mechanism portion make from end plate erect vortex shape scroll wraps determine vortex and dynamic vortex engagement and form expansion chamber between the two parties, and according to changing volume by above-mentioned expansion chamber when making above-mentioned dynamic vortex rotate along circular orbit under the rotation controlled conditions of rotation control mechanism while move and carry out the suction of working fluid, expand, discharge, it is characterized in that, the lubricant oil kept by suction pressure is supplied on the end plate back side of the side, scrollwork back of above-mentioned dynamic vortex, the scrollwork front end of above-mentioned dynamic vortex defines diaphragm seal holding tank, for storing diaphragm seal, the end plate of above-mentioned dynamic vortex is provided with the path bottom surface of the above-mentioned end plate back side and above-mentioned diaphragm seal holding tank being carried out to UNICOM.
Scroll expander involved by technological scheme 4 of the present invention, comprise expansion mechanism portion, this expansion mechanism portion make from end plate erect vortex shape scroll wraps determine vortex and dynamic vortex engagement and form expansion chamber between the two parties, and according to changing volume by above-mentioned expansion chamber when making above-mentioned dynamic vortex rotate along circular orbit under the rotation controlled conditions of rotation control mechanism while move and carry out the suction of working fluid, expand, discharge, it is characterized in that, on the end plate back side of the side, scrollwork back of above-mentioned dynamic vortex, be provided with sealed member central part and peripheral part separated, the lubricant oil kept by suction pressure is supplied to above-mentioned end plate back side central part, the lubricant oil kept by lower than suction pressure but higher than head pressure pressure is supplied to above-mentioned end plate back side peripheral part, and, the scrollwork front end of above-mentioned dynamic vortex defines diaphragm seal holding tank, for storing diaphragm seal, the end plate of above-mentioned dynamic vortex is provided with the path bottom surface of above-mentioned end plate back side central part and above-mentioned diaphragm seal holding tank being carried out to UNICOM.
Scroll expander involved by technological scheme 5 of the present invention, on the basis of the 1st or the 2nd technological scheme, is characterized in that: the above-mentioned expansion chamber on above-mentioned path and the scroll wraps inwall side being formed in above-mentioned dynamic vortex and after just closing is connected.
Scroll expander involved by technological scheme 6 of the present invention, on the basis of the 1st or the 2nd technological scheme, is characterized in that: the above-mentioned expansion chamber on above-mentioned path and the scroll wraps outer wall side being formed in above-mentioned dynamic vortex and after just closing is connected.
Scroll expander involved by technological scheme 7 of the present invention, 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 above-mentioned expansion chamber on 1st path and the scroll wraps inwall side being formed in above-mentioned dynamic vortex and after just closing is connected, the 2nd path and be formed in above-mentioned dynamic vortex scroll wraps outer wall side on and the 2nd above-mentioned expansion chamber after just closing be connected.
Scroll expander involved by technological scheme 8 of the present invention, 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, the above-mentioned expansion chamber on above-mentioned 1st path and the scroll wraps inwall side being formed in above-mentioned dynamic vortex and after just closing is connected.
Scroll expander involved by technological scheme 9 of the present invention, 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, the above-mentioned expansion chamber on above-mentioned 2nd path and the scroll wraps outer wall side being formed in above-mentioned dynamic vortex and after just closing is connected.
Scroll expander involved by technological scheme 10 of the present invention, 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, the 1st above-mentioned expansion chamber on above-mentioned 1st path and the scroll wraps inwall side being formed in above-mentioned dynamic vortex and after just closing is connected, above-mentioned 2nd path and be formed in above-mentioned dynamic vortex scroll wraps outer wall side on and the 2nd above-mentioned expansion chamber after just closing be connected.
Scroll expander involved by technological scheme 11 of the present invention, on the basis of the 2nd ~ 4th technological scheme, it is characterized in that: in above-mentioned path, restriction is set, using the volume of the cooling medium for the above-mentioned working fluid as suction, with be more than or equal to 2 % by weight but be less than 20 % by weight ratio, to above-mentioned expansion chamber supplying lubricating oil.
Scroll expander involved by technological scheme 12 of the present invention, on the basis of the 1st ~ 4th technological scheme, it is characterized in that: the refrigeration agent as above-mentioned working fluid is high-pressure refrigerant, such as, is carbon dioxide.
Invention effect
Scroll expander of the present invention can reliably lubricate the slide part determining vortex and dynamic vortex, and prevents suction efficiency from declining.Particularly when using high-pressure and low-pressure contracting than refrigeration agent and carbon dioxide coolant, high efficiency can be realized.
Accompanying drawing explanation
Fig. 1 is the sectional view of the scroll expander represented in the embodiment of the present invention 1;
Fig. 2 is the stereogram of the dynamic vortex representing scroll expander shown in Fig. 1;
Fig. 3 is the stereogram of the dynamic vortex representing the embodiment of the present invention 2 mesoscale eddies decompressor;
Fig. 4 represents that the refrigeration agent to the embodiment of the present invention 3 mesoscale eddies decompressor carries out the explanatory drawing (state after just closing) of closed process;
Fig. 5 represents that the refrigeration agent to the embodiment of the present invention 3 mesoscale eddies decompressor carries out the explanatory drawing (have rotated the state of 30 ° after firm closing) of closed process;
Fig. 6 represents that the refrigeration agent to the embodiment of the present invention 3 mesoscale eddies decompressor carries out the explanatory drawing (have rotated the state of 60 ° after firm closing) of closed process;
Fig. 7 represents that the refrigeration agent to the embodiment of the present invention 4 mesoscale eddies decompressor carries out the explanatory drawing (state after just closing) of closed process;
Fig. 8 represents that the refrigeration agent to the embodiment of the present invention 4 mesoscale eddies decompressor carries out the explanatory drawing (have rotated the state of 30 ° after firm closing) of closed process;
Fig. 9 represents that the refrigeration agent to the embodiment of the present invention 4 mesoscale eddies decompressor carries out the explanatory drawing (have rotated the state of 60 ° after firm closing) of closed process;
Figure 10 represents that in the embodiment of the present invention 5, efficiency of expander is relative to the performance plot of the lubricant oil delivery volume of the expansion chamber of scroll expander;
Figure 11 is the performance plot that the best of the circulating mass of refrigerant representing lubricant oil and scroll expander in the embodiment of the present invention 5 supplies ratio;
Figure 12 is the simplified cross-sectional view of existing scroll expander.
Embodiment
The lubricant oil kept by suction pressure is supplied to the end plate back side of the side, scrollwork back of above-mentioned dynamic vortex by the scroll expander meeting the present invention the 1st example, and on the end plate of above-mentioned dynamic vortex, be provided with the path scroll wraps bottom surface in the above-mentioned end plate back side and above-mentioned dynamic vortex center portion being carried out to UNICOM.According to this example, due to lubricant oil is fed in the sucting of expansion chamber, along with inflation process, in order the slide part determining vortex and dynamic vortex is lubricated, thus can provide the scroll expander that reliability is high.
The scroll expander meeting the present invention the 2nd example is so a kind of scroll expander, namely, on the end plate back side of the side, scrollwork back of above-mentioned dynamic vortex, be provided with sealed member central part and peripheral part separated, the lubricant oil kept by suction pressure is supplied to end plate back side central part, the lubricant oil kept by lower than suction pressure but higher than head pressure pressure is supplied to end plate back side peripheral part, and, the end plate of above-mentioned dynamic vortex is provided with the path scroll wraps bottom surface in above-mentioned end plate back side central part and above-mentioned dynamic vortex center portion being carried out to UNICOM.According to this example, particularly under the occasion that expansion ratio is large, because dynamic vortex does not push determining vortex with excessive pressure, thus can provide the scroll expander that reliability is high.
The scroll expander meeting the present invention the 3rd example is so a kind of scroll expander, namely, the lubricant oil kept by suction pressure is supplied to the end plate back side of the side, scrollwork back of above-mentioned dynamic vortex, the scrollwork front end of above-mentioned dynamic vortex defines diaphragm seal holding tank, for storing diaphragm seal, the path of UNICOM is carried out in the bottom surface that the end plate of above-mentioned dynamic vortex is provided with opposite end back and diaphragm seal holding tank.According to this example, owing to can be full of the gap of diaphragm seal holding tank and diaphragm seal by lubricant oil, the refrigeration agent thus leaked relative to effusion scroll wraps, improves sealing, can provide high performance scroll expander.And because lubricant oil is by the gap of diaphragm seal holding tank and diaphragm seal, along with inflation process, in order the slide part determining vortex and dynamic vortex is lubricated, thus can provide the scroll expander that reliability is high.
The scroll expander meeting the present invention the 4th example is so a kind of scroll expander, namely, on the end plate back side of the side, scrollwork back of dynamic vortex, be provided with sealed member central part and peripheral part separated, the lubricant oil kept by suction pressure is supplied to end plate back side central part, the lubricant oil kept by lower than suction pressure but higher than head pressure pressure is supplied to end plate back side peripheral part, and, the scrollwork front end of dynamic vortex defines diaphragm seal holding tank, for storing diaphragm seal, the path of UNICOM is carried out in the bottom surface that the end plate of above-mentioned dynamic vortex is provided with opposite end back central part and diaphragm seal holding tank.According to this example, particularly under the occasion that expansion ratio is large, because dynamic vortex does not push determining vortex with excessive pressure, thus can provide the scroll expander that reliability is higher.
The present invention the 5th example is in the scroll expander meeting the 1st or the 2nd example, and the above-mentioned expansion chamber on path and the scroll wraps inwall side being formed in dynamic vortex and after just closing is connected.According to this example, when particularly the temperature in expansion mechanism portion raises at low load, the space forming the dynamic vortex being formed at the expansion chamber of the scroll wraps inwall side of dynamic vortex and the contacting part determining scroll wrap portion can broaden because of thermal expansion, but in that case, the lubricant oil be injected in expansion chamber still will can improve sealing, can provide the scroll expander that performance is higher.
The present invention the 6th example is in the scroll expander meeting the 1st or the 2nd example, and the above-mentioned expansion chamber on path and the scroll wraps outer wall side being formed in dynamic vortex and after just closing is connected.According to this example, when particularly under excess load, the temperature in expansion mechanism portion declines, the space forming the dynamic vortex being formed at the expansion chamber of the scroll wraps outer wall side of dynamic vortex and the contacting part determining scroll wrap portion can broaden because of thermal shrinkage, but in that case, the lubricant oil be injected in expansion chamber still can improve sealing, can provide the scroll expander that performance is higher.
The present invention the 7th example is in the scroll expander meeting the 1st or the 2nd example, as above-mentioned path, be provided with the 1st path and the 2nd path, the 1st expansion chamber on 1st path and the scroll wraps inwall side being formed in above-mentioned dynamic vortex and after just closing is connected, the 2nd path and be formed in above-mentioned dynamic vortex scroll wraps outer wall side on and the 2nd expansion chamber after just closing be connected.According to this example, even if when the temperature in expansion mechanism portion raises at low load, or when under excess load, the temperature in expansion mechanism portion declines, the lubricant oil be injected in expansion chamber also can improve sealing, can provide the scroll expander that performance is higher.
The present invention the 8th example is in the scroll expander meeting the 3rd or the 4th example, except above-mentioned path, also be provided with the 1st path, the above-mentioned expansion chamber on above-mentioned 1st path and the scroll wraps inwall side being formed in above-mentioned dynamic vortex and after just closing is connected.According to this example, not only the refrigeration agent of effusion scroll wraps can be leaked, when also particularly the temperature in expansion mechanism portion raises at low load, the space forming the dynamic vortex being formed at the expansion chamber of the scroll wraps inwall side of dynamic vortex and the contacting part determining scroll wrap portion can broaden because of thermal expansion, in that case, the lubricant oil be injected in expansion chamber still will can improve sealing, can provide the scroll expander that performance is higher.
The present invention the 9th example is in the scroll expander meeting the 3rd or the 4th example, except above-mentioned path, also be provided with the 2nd path, the above-mentioned expansion chamber on above-mentioned 2nd path and the scroll wraps outer wall side being formed in above-mentioned dynamic vortex and after just closing is connected.According to this example, not only the refrigeration agent of effusion scroll wraps can be leaked, when also particularly under excess load, the temperature in expansion mechanism portion declines, the contacting part space forming the dynamic vortex being formed at the expansion chamber of the scroll wraps outer wall side of dynamic vortex and the scroll wraps of determining vortex can broaden because of thermal shrinkage, in that case, the lubricant oil be injected in expansion chamber still will can improve sealing, can provide the scroll expander that performance is higher.
The present invention the 10th example is in the scroll expander meeting the 3rd or the 4th example, except above-mentioned path, be provided with the 1st path and the 2nd path, the 1st expansion chamber on above-mentioned 1st path and the scroll wraps inwall side being formed in above-mentioned dynamic vortex and after just closing is connected, above-mentioned 2nd path and be formed in above-mentioned dynamic vortex scroll wraps outer wall side on and the 2nd expansion chamber after just closing be connected.According to this example, not only the refrigeration agent of effusion scroll wraps can be leaked, can also at low load expansion mechanism portion temperature raise time, when under excess load, the temperature in expansion mechanism portion declines, improve sealing by the lubricant oil be injected in expansion chamber, thus can provide the scroll expander that performance is higher.
The present invention the 11st example is in the scroll expander meeting the 1st ~ 4th example, for the amount of the refrigeration agent as the above-mentioned working fluid be inhaled into, to be more than or equal to the ratio that 2 % by weight are still less than 20 % by weight, to above-mentioned expansion chamber supplying lubricating oil, restriction is set in above-mentioned path.According to this example, while raising suction efficiency, also improve sealing, the scroll expander that performance is higher can be provided.
The present invention the 12nd example is in the scroll expander meeting the 1st ~ 4th example, and the refrigeration agent as above-mentioned working fluid is high-pressure refrigerant, such as, be carbon dioxide.According to this example, due to compared with freon series coolant, in inflation process, theoretical recovery power is large, thus can improve cycle efficiency further.And due to compared with freon series coolant, carbon dioxide coolant pressure reduction is large, thus makes sealing improve further, can provide the scroll expander that performance is higher.
(embodiment 1)
Hereinafter with reference to accompanying drawing, embodiments of the invention are introduced.The present invention is not limited to the record of this embodiment.
Fig. 1 is the sectional view of the scroll expander represented in the embodiment of the present invention 1.
Scroll expander in the present embodiment by with determine dynamic vortex 13 that vortex 12 engages and be clamped in main bearing parts 11 and determine between vortex 12 by bolton on these main bearing parts 11, the main shaft part 4a of main bearing parts 11 to the crankshaft 4 be fixed in seal container 1 by modes such as welding or shrink fit is supported.Between dynamic vortex 13 and main bearing parts 11, be provided with the rotation of anti-stop vortex 13 and carry out the rotation control mechanisms 14 such as the Othemos ring (オ Le ダ system リ Application グ) led in the mode of circular orbit motion.
In said structure, by carrying out eccentric drive by the eccentric axial portion 4b being positioned at crankshaft 4 upper end to dynamic vortex 13, vortex 13 is made to carry out circular orbit motion.By this motion, be formed in the expansion chamber 15 determined between vortex 12 and dynamic vortex 13 mobile to outer peripheral side while expand from central part.Utilize this change, suck refrigeration agent from the suction pipe 16 led to seal container 1 with the suction port 17 determining vortex 12 central part and make it expand.Refrigerant gas below authorized pressure is discharged to seal container 1 from the exhaust port 18 determining vortex 12 outer circumferential side.
The lower end side of crankshaft 4 is supported by supplementary bearing parts 21, is configured with 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, the lubricant oil 6 kept by suction pressure is supplied on the end plate back side, lubrication and cooling is carried out to main shaft bearing portion 11a and eccentric shaft bearing portion 11b.Then through lubricant oil return aperture 26, return lubricant oil 20, carry out recirculation.
On the other hand, the part reaching the lubricant oil 6 of eccentric shaft bearing portion 11b is reduced pressure by the throttle passage 28 being arranged on dynamic vortex 13 inside, is supplied to back pressure chamber 29.And, on the end plate back side of the side, scrollwork back of dynamic vortex 13, be provided with the sealed member 5 central part and peripheral part separated.The pressure of lubricant oil 6 and the pressure of back pressure chamber 29 that arrive eccentric shaft bearing portion 11b separate by sealed member 5.
Along with the accumulation of the lubricant oil 6 be fed in 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.Once the pressure set by the pressure ratio of back pressure chamber 29 is high, then back pressure regulating mechanism 9 works, and is discharged to outside seal container 1 by the lubricant oil 6 of back pressure chamber 29 together with refrigeration agent.By the work of this back pressure regulating mechanism 29, particularly when expansion ratio is large, because dynamic vortex 13 does not push determining vortex 12, so can provide the scroll expander that reliability is high with excessive pressure.
Fig. 2 is the stereogram of the dynamic vortex representing scroll expander shown in Fig. 1.
In fig. 2, be that scroll wraps bottom surface 13b defines vortex shape scroll wraps 13c on the end plate 13a of dynamic vortex 13, and on end plate 13a, define the path 30 end plate back side 13d of the side, scrollwork back of dynamic the vortex 13 and scroll wraps bottom surface 13b of dynamic vortex 13 central part being carried out to UNICOM.
By this structure, lubricant oil 6 is fed in the sucting of expansion chamber 15, along with inflation process, lubricates in order to the slide part determining vortex 12 and dynamic vortex 13.Thus the scroll expander that reliability is high can be provided.
The end plate back side 13d of the side, scrollwork back of dynamic vortex 13 also can not arrange sealed member 5 (not shown) central part and peripheral part separated, now, because structure is simple, can manufacturing procedure be reduced, thus can provide the scroll expander that cost is lower.
(embodiment 2)
Fig. 3 is the stereogram of the dynamic vortex representing the embodiment of the present invention 2 mesoscale eddies decompressor.
The scroll expander of this embodiment defines diaphragm seal holding tank 32 on the scroll wraps 13c front end of dynamic vortex 13, for storing diaphragm seal 31.End plate 13a defines the path 33 bottom surface of diaphragm seal holding tank 32 and end plate back side 13d being carried out to UNICOM.
By this structure, the gap of diaphragm seal holding tank 32 and diaphragm seal 31 can be full of by lubricant oil 6, thus 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 passes through the gap of diaphragm seal holding tank 32 and diaphragm seal 31, along with inflation process, in order the slide part determining vortex 12 and dynamic vortex 13 is lubricated, thus can provide the scroll expander that reliability is high.
The side end panel back side, the scrollwork back 13d of dynamic vortex 13 also can not arrange sealed member 5 (not shown) central part and peripheral part separated, now, because structure is simple, can manufacturing procedure be reduced, thus can provide the scroll expander that cost is lower.
(embodiment 3)
Fig. 4 ~ Fig. 6 represents that the embodiment of the present invention 3 mesoscale eddies decompressor carries out the explanatory drawing of closed process to refrigeration agent.The process that two scroll wraps are closed refrigeration agent is illustrated according to the rotation angle of crankshaft.Here, the 1st path 30a represents the position on the end plate 13a being arranged on dynamic vortex 13 not shown in the figures.
Fig. 4 shows the moment of formation the 1st expansion chamber 15a.Namely show: the contacting part 34 produced by the scroll wraps 13c inwall side of dynamic vortex 13 and the contacting of scroll wraps 12c outer wall side of determining vortex 12, forms the state (state after just closing) of the 1st expansion chamber 15a.
Fig. 5 and Fig. 6 shows the 1st expansion chamber 15a and (after firm closing, have rotated the state of 30 ° by the state of the left-handed rotation and sequential inflation of moving vortex 13; The state of 60 ° is have rotated) after firm closing.
In the scroll expander of the present embodiment, when defining the 1st expansion chamber 15a completed refrigeration agent is closed in the scroll wraps 13c inwall side of dynamic vortex 13, the 1st path 30a is just connected with the 1st expansion chamber 15a.
By forming the 1st path 30a, when particularly the temperature in expansion mechanism portion raises at low load, form the 1st expansion chamber 15a, the space of contacting part 34 part of scroll wraps 12c and scroll wraps 13c broadens due to thermal expansion, but the lubricant oil 6 in that case, be injected in the 1st expansion chamber 15a plays the effect improving sealing.By this effect, the scroll expander that performance is higher can be provided.
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, but once turn to the angle shown in Fig. 6, then the 1st path 30a is inaccessible by the scroll wraps 12c determining vortex 12.Thus lubricant oil 6 can not exceedingly be flowed in the 1st expansion chamber 15a.
By the 1st path 30a of the present embodiment is arranged on the dynamic vortex of the scroll expander in embodiment illustrated in fig. 32, not only the refrigeration agent of effusion scroll wraps can be leaked, when also particularly the temperature in expansion mechanism portion raises at low load, although the space of the contacting part of the dynamic vortex forming the expansion chamber be formed on the scroll wraps inwall side of dynamic vortex and the scroll wraps of determining vortex can broaden, but the lubricant oil be injected in expansion chamber still can improve sealing, thus the scroll expander that performance is higher can be provided.
(embodiment 4)
Fig. 7 ~ Fig. 9 represents that the embodiment of the present invention 4 mesoscale eddies decompressor carries out the explanatory drawing of closed process to refrigeration agent.Illustrate two scroll wraps according to the rotation angle of crankshaft and closed process is carried out to refrigeration agent.Now, the 2nd path 30b represents the position on the end plate 13a being arranged on dynamic vortex 13 not shown in the figures.
Fig. 7 display defines the moment of the 2nd expansion chamber 15b.Namely show: by dynamic vortex 13 scroll wraps 13c outer wall side with determine the contacting of scroll wraps 12c inwall side of vortex 12 and the contacting part 34 that produces, form the state of the 2nd expansion chamber 15b.
Fig. 8 and Fig. 9 shows the state of the 2nd expansion chamber 15b by the left-handed rotation and sequential inflation of moving vortex 13.
In the scroll expander of the present embodiment, when the scroll wraps 13c outer wall side of dynamic vortex 13 defines the 2nd expansion chamber 15b completed refrigeration agent is closed, the 2nd path 30b and the 2nd expansion chamber 15b is connected.
By forming the 2nd path 30b, when particularly under excess load, the temperature in expansion mechanism portion declines, the space forming the scroll wraps 12c of the 2nd expansion chamber 15b and contacting part 34 part of scroll wraps 13c broadens because of thermal shrinkage, but the lubricant oil 6 in that case, be injected in the 2nd expansion chamber 15b plays the effect improving sealing.By this effect, the scroll expander that performance is higher can be provided.
By the 2nd path 30b, along with the expansion of the 2nd expansion chamber 15b, lubricant oil 6 injects the 2nd expansion chamber 15b, but once turn to the angle shown in Fig. 9, then the 2nd path 30b is inaccessible by the scroll wraps 12c determining vortex 12.Thus making lubricant oil 6 to exceed desirably flows in the 2nd expansion chamber 15b.
Also can form the 1st path 30a and the 2nd path 30b two paths simultaneously, wherein the 1st path 30a define in the scroll wraps 13c inwall side of dynamic vortex 13 complete to refrigeration agent close the 1st expansion chamber 15a time and the 1st expansion chamber 15a be connected, the 2nd path 30b the scroll wraps 13c outer wall side of dynamic vortex 13 define complete to refrigeration agent close the 2nd expansion chamber 15b time and the 2nd expansion chamber 15b be connected.And relative to 1 expansion chamber, many paths can be formed.
By this structure, when the temperature in expansion mechanism portion raises at low load, or when under excess load, expansion mechanism portion temperature declines, all can control subtly the injection of lubricant oil, thus improve the sealing of the lubricant oil injected, the scroll expander that performance is higher can be provided.
By the 2nd path 30b of the present embodiment is arranged on the dynamic vortex of the scroll expander in embodiment illustrated in fig. 32, not only the refrigeration agent of effusion scroll wraps can be leaked, but also can particularly under excess load expansion mechanism portion temperature decline time, although the space of the contacting part of the dynamic vortex forming the expansion chamber be formed on dynamic scroll wrap portion outer wall side and the scroll wraps of determining vortex can broaden, but the lubricant oil be injected in expansion chamber still can improve sealing, thus the scroll expander that performance is higher can be provided.
And, by the 1st path 30a of above-described embodiment and the 2nd path 30b of the present embodiment is arranged on the dynamic vortex of the scroll expander in embodiment illustrated in fig. 32, not only the refrigeration agent of effusion scroll wraps can be leaked, and at low load expansion mechanism portion temperature raise time, or when under excess load, the temperature in expansion mechanism portion declines, the lubricant oil be injected in expansion chamber can improve sealing, thus can provide the scroll expander that performance is higher.
(embodiment 5)
Figure 10 represents that in the embodiment of the present invention 5, efficiency of expander is relative to the performance plot of the lubricant oil delivery volume of the expansion chamber of scroll expander.
As shown in the figure, even if make condition 1, condition 2, condition 3, condition 4 change with operating conditions, for these conditions, also there is the supply ratio that efficiency becomes maximum lubricant oil 6.If namely supply lubricant oil 6 to expansion chamber 15, then cryogen containment improves, if overfeeding lubricant oil, then lubricant oil 6 becomes greatly with the ratio sucking volume, and thus suction efficiency declines.
Figure 11 is the performance plot of the best supply ratio of the circulating mass of refrigerant representing lubricant oil relative swirl decompressor in the embodiment of the present invention 5.
As shown in the figure, if to be more than or equal to the ratio that 2 % by weight are still less than 20 % by weight, to expansion chamber 15 supplying lubricating oil 6, then can suction efficiency be improved and make sealing improve, thus can provide the scroll expander that performance is higher.Such as by arranging the restriction of reduced inner diameter etc. in path, just can realize being more than or equal to the supply ratio (not shown) that 2 % by weight are still less than 20 % by weight.
Refrigeration agent as working fluid can use high-pressure refrigerant, such as carbon dioxide, and due to compared with freon series coolant, in inflation process, theoretical recovery power is large, thus by making decompressor high efficiency, can improve cycle efficiency further.And due to compared with freon series coolant, carbon dioxide coolant differential pressure is large, thus making sealing improve, by using carbon dioxide coolant in the present invention, can provide the scroll expander that performance is higher.
As mentioned above, the lubricant oil kept by suction pressure is supplied on the end plate back side of the side, scrollwork back of dynamic vortex by scroll expander according to the invention, and the path of UNICOM is carried out in the scroll wraps bottom surface being provided with opposite end back and dynamic vortex center portion on end plate.By this structure, lubricant oil is fed to sucting, along with inflation process, in order the slide part determining vortex and dynamic vortex is lubricated, thus the scroll expander that reliability is high can be provided.And working fluid is not limited to refrigeration agent, also can be applied in using air, helium in the scroll expander or scroll fluid machine of working fluid.
Claims (3)
1. a scroll expander, comprise expansion mechanism portion, this expansion mechanism portion make from end plate erect vortex shape scroll wraps determine vortex and dynamic vortex engagement and form expansion chamber between the two parties, and according to changing volume by above-mentioned expansion chamber when making above-mentioned dynamic vortex rotate along circular orbit under the rotation controlled conditions of rotation control mechanism while move and carry out the suction of working fluid, expansion, discharge, it is characterized in that
On the end plate back side of the side, scroll wraps back of above-mentioned dynamic vortex, be provided with sealed member central part and peripheral part separated, the lubricant oil kept by suction pressure is supplied to above-mentioned end plate back side central part, the lubricant oil kept by lower than suction pressure but higher than head pressure pressure is supplied to above-mentioned end plate back side peripheral part, and, the end plate of above-mentioned dynamic vortex is provided with the path scroll wraps bottom surface in above-mentioned end plate back side central part and above-mentioned dynamic vortex center portion being carried out to UNICOM, and, be provided with and the pressure of above-mentioned end plate back side peripheral part is remained certain back pressure regulating mechanism,
As above-mentioned path, be provided with the 1st path and the 2nd path, the 1st above-mentioned expansion chamber on 1st path and the scroll wraps inwall side being formed in above-mentioned dynamic vortex and after just closing is connected, the 2nd above-mentioned expansion chamber on 2nd path and the scroll wraps outer wall side being formed in above-mentioned dynamic vortex and after just closing is connected
Above-mentioned 1st path from inaccessible by above-mentioned scroll wraps of determine vortex when have rotated 60 ° after just closing, above-mentioned 2nd path from when have rotated 60 ° after just closing by above-mentioned scroll wraps obturation of determining vortex.
2. scroll expander according to claim 1, it is characterized in that: in above-mentioned path, restriction is set, for as the volume of the cooling medium of above-mentioned working fluid sucked, be more than or equal to 2 % by weight but be less than 20 % by weight ratio, to above-mentioned expansion chamber supplying lubricating oil.
3. scroll expander according to claim 1, is characterized in that: the refrigeration agent as above-mentioned working fluid is 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 CN101713300A (en) | 2010-05-26 |
| CN101713300B true 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) |
Families Citing this family (4)
| 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 |
| CN105673082B (en) * | 2016-01-19 | 2018-01-26 | 上海理工大学 | Miniature organic Rankine bottoming cycle scroll expander |
| 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 |
Family Cites Families (7)
| 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 |
| JPH0828461A (en) * | 1994-07-11 | 1996-01-30 | Toshiba Corp | Scroll expander |
| 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 |
| KR100924895B1 (en) * | 2002-05-24 | 2009-11-02 | 파나소닉 주식회사 | 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
Also Published As
| Publication number | Publication date |
|---|---|
| CN101713299A (en) | 2010-05-26 |
| CN101713300A (en) | 2010-05-26 |
| CN101713299B (en) | 2014-12-24 |
| CN1869448A (en) | 2006-11-29 |
| JP2006307753A (en) | 2006-11-09 |
| CN1869448B (en) | 2010-06-23 |
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