CN101324233A - Scroll compressor and operation mode thereof - Google Patents
Scroll compressor and operation mode thereof Download PDFInfo
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- CN101324233A CN101324233A CNA2008100292907A CN200810029290A CN101324233A CN 101324233 A CN101324233 A CN 101324233A CN A2008100292907 A CNA2008100292907 A CN A2008100292907A CN 200810029290 A CN200810029290 A CN 200810029290A CN 101324233 A CN101324233 A CN 101324233A
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- 238000003825 pressing Methods 0.000 claims abstract description 12
- 238000002788 crimping Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 abstract description 13
- 238000009434 installation Methods 0.000 abstract description 7
- 238000005457 optimization Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000007906 compression Methods 0.000 description 29
- 239000012530 fluid Substances 0.000 description 28
- 239000003921 oil Substances 0.000 description 25
- 230000006835 compression Effects 0.000 description 18
- 239000000314 lubricant Substances 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000007599 discharging Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 230000002153 concerted effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The invention relates to a scroll compressor and an operation mode thereof, wherein the scroll compressor comprises a shell, a non-revolution scroll member, a rack, a driving crankshaft, an installation mechanism and a cross slip ring; when the non-revolution vortex piece is assembled with the upper shell, an exhaust pressure backpressure cavity with elastic exhaust gas is enclosed on the back side of the non-revolution vortex piece through the sealing of the sealing assembly, the back side of the non-revolution vortex piece is in sliding pressure contact with the inner wall of the exhaust pressure backpressure cavity through the sealing assembly, and the non-revolution vortex piece is sleeved on the elastic component in the installation mechanism in an up-and-down sliding manner and can axially move within a certain range. The spring force is used as a third pressing force to act on the back side of the non-revolution scroll, and under the condition that no intermediate pressure acts on the back side of the non-revolution scroll, the optimization of contact force between the end surfaces of the non-revolution scroll and the back side supporting force of the revolution scroll is realized. The invention has the characteristics of low manufacturing cost and high working efficiency.
Description
Technical field
The present invention relates to a kind of scroll compressor and the method for operation thereof, it is except the first downward axial throw-on pressure and the second axial throw-on pressure that the pressure of inspiration(Pi) back pressure cavity that adopts black box and separate and exhaust pressure back pressure cavity produce, and the spring force that adopts several length of spring compressed generations is as the 3rd axial throw-on pressure.
Background technique
Existing scroll compressor, be included in base plate and be provided with the non-revolution scroll of vortex shape crimping, be provided with the vortex matter revolution of vortex shape crimping with end plate, two scroll mesh configuration in opposite directions, by dwindling a plurality of pressing chambers that are formed between mutual crimping successively, compression enters the fluid in the scroll compressor.Fluid produces in compression process and makes vortex matter revolution and non-revolution scroll axial force disconnected from each other, causes vortex matter revolution and non-revolution scroll axial separation; The tangential gas force that fluid produces in compression process has scroll to topple the trend of motion.In case after big gap occurring between at the bottom of the tooth top of two crimpings and the tooth, will leak.
For motor side pressure is the scroll compressor of exhaust pressure structure, at present the general technology that adopts of producer is to set up exhaust pressure and pressure of inspiration(Pi) at the dorsal part of vortex matter revolution, as the G series vortex matter revolution that compressor adopts of the big King Company exploitation technology of floating; Or the back pressure chamber of middle pressure, the unsteady technology that intermediate pressure between exhaust pressure and pressure of inspiration(Pi) that is adopted as the scroll compressor product of Hitachi, Ltd and exhaust pressure gas force act on the vortex matter revolution dorsal part.Like this, the pressure of the fluid by the vortex matter revolution dorsal part forces the non-revolution scroll closely to contact with vortex matter revolution, the vortex that prevents to revolve round the sun topple and with the separating of vortex matter revolution, and prevent to leak.
As shown in Figure 1, set up exhaust pressure back pressure chamber 501 at the vortex matter revolution dorsal part, by the dorsal part that passage is directed to high-pressure liquid vortex matter revolution is set, utilizing hydrodynamic pressure to hold up vortex matter revolution is pressed against on the non-revolution scroll, closely contact and realize sealing, vortex matter revolution breaks away from frame and upwards floats, and uses black box that the exhaust pressure back pressure chamber is separated with the pressure of inspiration(Pi) chamber; For preventing that vortex matter revolution from toppling, the moment that its back side pressure forms must be greater than tilting moment.Because the action radius of back side pressure is less, for the moment that satisfies its generation greater than tilting moment, required back side pressure must be very big, thereby make that the axial contact force between vortex matter revolution and the non-revolution scroll is very big.Because the vortex matter revolution dorsal part is an exhaust pressure and can't follow pressure of inspiration(Pi) and change, therefore when little pressure ratio, can't produce enough active forces that makes progress at the vortex matter revolution dorsal part, produce between the scroll this moment and topple and separate, cold seriously descends, efficient reduces significantly, and because the vortex matter revolution eccentric wear that topples, directly has influence on the reliability of compressor.If guarantee that compressor reliably turns round when little pressure ratio, when big pressure ratio, just will inevitably make the throw-on pressure surplus so, seriously increase abrasion, so greatly reduce compression efficiency and reliability.Among the figure, the axial stress surface that contacts between 601 expression vortex matter revolutions and non-revolution scroll end faces.
As shown in Figure 2, set up the back pressure chamber 502 of intermediate pressure at the vortex matter revolution dorsal part, by the dorsal part that passage is directed to fluid in the compression chamber vortex matter revolution is set, utilizing hydrodynamic pressure to hold up vortex matter revolution is pressed against on the non-revolution scroll, closely contact and realize sealing, vortex matter revolution disengaging frame is upwards floated; For preventing that vortex matter revolution from toppling, the moment that its back side pressure forms must be greater than tilting moment.Because the action radius of back side pressure is less, for the moment that satisfies its generation greater than tilting moment, required back side pressure must be very big, thereby make that the axial contact force between vortex matter revolution and the non-revolution scroll is very big, increased friction power loss.This structure more complicated, fuel delivery is big, and it is big that compressor is told oil mass, directly has influence on systematic function; And intermediate pressure chamber and compression process generation mass exchange, compression process pressure is raise, increased compression power consumption, therefore reduced compression efficiency.Among the figure, the axial stress surface that contacts between 602 expression vortex matter revolutions and non-revolution scroll end faces.
For motor side pressure is the scroll compressor of the pressure of inspiration(Pi) structure of low pressure, the general technology that adopts roughly is divided into two kinds, a kind of is by the tooth top at the scrollwork of vortex matter revolution and non-revolution scroll the leakage that black box prevents fluid in the compression process to be installed, as the at present big B of King Company series and D is serial and Sanyo's scroll compressor product is adopted technology; Another kind method is to set up the back pressure chamber of high pressure at the dorsal part of non-revolution scroll, as U.S. Patent number 4,767, the 293 disclosed technology of Copeland Corp; Or the back pressure chamber of high and medium voltage, U.S. Patent number 4,877,382 disclosed technology as Copeland Corp, force the non-revolution scroll to press vortex matter revolution by the pressure of fluid wherein, make it closely on contact support and prevent to topple, separate and leak.
As shown in Figure 3, the technology of black box 503a and 503b is installed at the scrollwork tooth top, requirement is installed black box at the tooth top fluting of scrollwork, because the wall thickness of scrollwork is less, generally at 3～5mm, therefore necessarily require accurate processing and installation, processing and material requirements height to black box, increased more cost, in addition because the friction that leakage that black box produces and contact movement produce causes power consumption to increase, and the reliability of Sealing is difficult to guarantee, causes compressor performance and reliability lower.Among the figure, the axial stress surface that contacts between 603 expression frames and vortex matter revolution dorsal parts.
As shown in Figure 4, set up exhaust pressure back pressure chamber 504a and intermediate pressure back pressure chamber 504b simultaneously at the dorsal part of non-revolution scroll, utilize the exhaust pressure of fluid wherein and intermediate pressure to force the non-revolution scroll tightly to be pressed against on the vortex matter revolution and realize sealing, vortex matter revolution is compressed against on the frame.The counterpressure of non-revolution scroll dorsal part must be greater than the axial separation force that produces in the fluid compression procedure, because the existence of the tilting moment that produces by crank-driven on the vortex matter revolution, so for preventing that vortex matter revolution from toppling, the moment that axially presses the contact force generation between non-revolution scroll and the vortex matter revolution must be greater than tilting moment.Though intermediate pressure changes with pressure of inspiration(Pi), can optimize the contact force between vortex matter revolution and non-revolution scroll end face better, but because the dorsal part of vortex matter revolution is the pressure of inspiration(Pi) of low pressure, the holder power that makes progress of its generation hydrodynamic pressure in the compression chamber of the high pressure of non-revolution scroll dorsal part or middle pressure, therefore make vortex matter revolution very big to the throw-on pressure of frame, friction power loss increases, and causes performance to reduce.In addition,, increased the influence of leakage way and intermediate pressure back pressure chamber, caused cold to reduce and the power consumption increase, influenced the raising of compression efficiency the compressor compresses process because there is an intermediate pressure back pressure chamber in non-revolution scroll dorsal part.
As shown in Figure 5, only set up the back pressure chamber 505 of the exhaust pressure of high pressure at the dorsal part of non-revolution scroll, utilize the exhaust pressure of fluid wherein to force the non-revolution scroll tightly to be pressed against on the vortex matter revolution and realize sealing, vortex matter revolution is compressed against on the frame.Therefore the counterpressure of non-revolution scroll dorsal part must be greater than the axial separation force that produces in the fluid compression procedure, and because the existence of the tilting moment that produces by crank-driven on the vortex matter revolution, so for preventing that vortex matter revolution from toppling, the moment that axially presses the contact force generation between non-revolution scroll and the vortex matter revolution must be greater than tilting moment.Because can not following pressure of inspiration(Pi), the exhaust pressure of high pressure changes, therefore when operating mode changes, the tight contact of scroll as will guarantee little pressure ratio the time, will produce considerable pressure surplus during so big pressure ratio, make the contact force of scroll end face worsen serious, and because the dorsal part of vortex matter revolution is the pressure of inspiration(Pi) of low pressure, the holder power that makes progress of its generation is defeated hydrodynamic pressure with pressure of inspiration(Pi) much smaller than the exhaust pressure of non-revolution scroll dorsal part, therefore make vortex matter revolution more strengthen to the throw-on pressure of frame, friction power loss acutely increases, and causes Performance And Reliability to decline to a great extent.
Summary of the invention
Purpose of the present invention aim to provide a kind of simple and reasonable, fabricating cost is low, high working efficiency, can prevent effectively under the various operating modes that vortex matter revolution from toppling, the support force to contact force between the scroll end face and revolution vortex dorsal part is optimized to the full extent, the scroll compressor and the method for operation thereof that service behaviour and safety reliability are all very high are to improve deficiency of the prior art.
By a kind of scroll compressor of this purpose design, comprise the housing of compressor; And the non-revolution scroll, its vortex shape crimping is arranged on the end plate, and end plate is arranged on around the crimping, and is connected with the front end of crimping; Vortex matter revolution, its vortex shape crimping is arranged on the end plate; The crimping of non-revolution scroll and vortex matter revolution is combined to form a plurality of pressing chambers; Be used to support the frame of vortex matter revolution; By the driving bent axle that the main bearing in the frame supports, its driving is connected to vortex matter revolution, makes revolution motion to drive vortex matter revolution with respect to the non-revolution scroll; Be used for the non-revolution scroll is installed to mounting mechanism on the frame; Be used for preventing the cross slip ring of vortex matter revolution rotation; The dorsal part that is sealed in the non-revolution scroll by black box when non-revolution scroll and upper shell assembling surrounds the exhaust pressure back pressure cavity that rubber-like is discharged gas jointly, non-revolution scroll dorsal part touches by the inwall sliding pressure of black box and exhaust pressure back pressure cavity, the exhaust pressure back pressure cavity be positioned at exhaust chamber compressor lower motor side, that form by frame and main casing and black box and be communicated with; Its structure characteristic is on the upper and lower elastic member that is set in slidably in the mounting mechanism of non-vortex matter revolution, and can move axially within the specific limits.
The active force that acts on non-revolution scroll dorsal part comprises that the pressure of inspiration(Pi) and the exhaust pressure that are separated by black box produce the downward first axial throw-on pressure and the second axial throw-on pressure, and spring produces the 3rd downward axial throw-on pressure; The active force that acts on the vortex matter revolution dorsal part comprises that the pressure of inspiration(Pi) and the exhaust pressure that are separated by black box produce active force upwards.Vortex matter revolution and non-revolution scroll closely contacts under the effect of making a concerted effort of dorsal part separately and realize axial seal, be used for the non-revolution scroll be installed to mounting mechanism on the frame allow the non-revolution scroll to install after axially doing certain unsteady.
Described elastic member comprises and passes the positioning rod that non-revolution scroll outer rim and frame are joined, positioning rod is provided with positive stop lug boss, positive stop lug boss is positioned at non-revolution scroll outer rim top, non-revolution scroll outer rim is upper and lower to be set on the positioning rod slidably, spring one end is crimped on the non-revolution scroll outer rim, and the other end is crimped on the limited step.
Described spring is a butterfly spring, and this butterfly spring is set on the positioning rod, and the one end is crimped on the non-revolution scroll outer rim, and the other end is crimped on the limited step.
Described elastic member also comprises the short cover that is set on the positioning rod, the limited step of short cover top and positioning rod joins, bottom and frame are joined, the upper and lower weak point that is set in slidably of non-revolution scroll outer rim puts, be set in outer butterfly spring one end of short cover and be crimped on the non-revolution scroll outer rim, the other end is crimped on the limited step.
Described spring is a pressure spring, is provided with compressing piece between positioning rod and the pressure spring, and this compressing piece one end is crimped on the positive stop lug boss of positioning rod, and the other end is crimped on the pressure spring the other end, and pressure spring one end is crimped on the non-revolution scroll outer rim.
Described compressing piece is Z-shaped, and pressure spring is arranged on the positioning rod next door.
Described non-revolution scroll outer rim is provided with the assembling groove that holds pressure spring.
Described elastic member also comprises the short cover that is set on the positioning rod, short cover top and compressing piece one end join, compressing piece one end is crimped on the positive stop lug boss of positioning rod, short cover bottom and frame are joined, the upper and lower weak point that is set in slidably of non-revolution scroll outer rim puts, the compressing piece the other end is crimped on the pressure spring the other end, and pressure spring one end is crimped on the non-revolution scroll outer rim.
A kind of method of operation of scroll compressor, it is characterized in that at non-revolution scroll dorsal part except the first downward axial throw-on pressure and the second axial throw-on pressure that the pressure of inspiration(Pi) back pressure cavity that adopts black box and separate and exhaust pressure back pressure cavity produce respectively, adopt spring force that one and above length of spring compressed produce as the 3rd axial throw-on pressure, these three axial throw-on pressure actings in conjunction are in the dorsal part of non-revolution scroll, make the non-revolution scroll vortex matter revolution is pressed against the top of frame, the non-revolution scroll closely contacts realization axial seal with vortex matter revolution, and the non-revolution scroll can move axially within the specific limits.Non-revolution scroll dorsal part is under the situation of no intermediate pressure effect, the optimization of contact force and vortex matter revolution back side bracket support force between realization non-revolution scroll and vortex matter revolution end face, promptly compressor operation is all realized stressed optimization under various operating modes.
Be provided with high pressure, low pressure, three chambers of high pressure in the housing of compressor; In housing, surround high pressure and low pressure space independently each other by main casing and frame, non-revolution scroll and upper shell and black box each other thereof, wherein, upper space is discharged the exhaust pressure back pressure cavity of gas for the top high pressure, intermediate space is the pressure of inspiration(Pi) back pressure cavity, lower space is a bottom high pressure gas chamber, and the exhaust pressure back pressure cavity that bottom high pressure gas chamber is discharged gas by outside exhaust manifolds and top high pressure is communicated with.The exhaust pressure back pressure cavity is connected with pressing chamber.
Housing and frame and between black box enclosure interior is separated into upper and lower two airtight and spaces independently each other, lower space is the bottom high pressure gas chamber of compressed fluid discharging, motor is arranged in the high pressure gas chamber of bottom; Be provided with non-revolution scroll and vortex matter revolution in the upper space, non-revolution scroll and housing and between black box upper space is separated into two airtight and spaces independently each other, wherein, by non-revolution scroll and upper shell and between the upper space that black box surrounded discharge the exhaust pressure back pressure cavity of gas for the top high pressure, by the non-revolution scroll, upper shell, frame and between the space that surrounds of black box be the pressure of inspiration(Pi) back pressure cavity, the cross slip ring is arranged in the pressure of inspiration(Pi) back pressure cavity, and the pressure of inspiration(Pi) back pressure cavity is connected with the suction pipe that is arranged on the housing side.
The dorsal part of non-revolution scroll is provided with annular projection, this annular projection forms airtight chamber by black box and the upper shell top that is arranged on its outside, the center of the vortex shape crimping of non-revolution scroll is provided with exhaust port, exhaust port is communicated with airtight chamber, constitutes the exhaust pressure back pressure cavity that the top high pressure is discharged gas.
Scroll compressor of the present invention, the active force that acts on non-revolution scroll dorsal part comprises the first downward axial force and second axial force that the pressure of inspiration(Pi) that separated by black box and exhaust pressure produce, and downward the 3rd axial force that produces of spring; The active force that acts on the vortex matter revolution dorsal part comprises the active force that the pressure of inspiration(Pi) that separated by black box and exhaust pressure produce.Vortex matter revolution and non-revolution scroll are under the effect of making a concerted effort of dorsal part separately, the axial separation force than fluid in the compression process or gas generation is big with joint efforts to guarantee non-revolution scroll dorsal part on the one hand, on the other hand vortex matter revolution is pressed against on the supporting surface of frame, guarantees that vortex matter revolution does not topple.When liquid compression took place, the non-revolution scroll can move up vertically and realize the separation of two scroll, thereby caused the infringement of two scroll when having prevented liquid compression effectively, had improved the reliability of compressor.Act on the non-revolution scroll by spring force, because spring force does not change with operating mode, under little pressure ratio operating mode, just can compensate the deficiency of non-revolution scroll backside gas pressure, guaranteed that the non-revolution scroll is pressed against vortex matter revolution on the frame reliably under the little pressure ratio operating mode, thereby prevent that compression process from taking place to leak and eccentric wear, and the relation of the exhaust pressure cavity area by optimizing exhaust pressure back pressure cavity and vortex matter revolution dorsal part, it is bigger or suitable that the area that makes exhaust pressure back pressure cavity gas pressure act on the non-revolution scroll seals the area that is sealed than vortex matter revolution dorsal part, make its area ratio remain on 1.0～1.7, thereby all can guarantee to be included in the high efficiency and the reliability of big pressure ratio and the condition scope inner compressor running of changing a job for the national games of little pressure ratio.Because the intermediate pressure that uses spring force to replace non-revolution scroll dorsal part to change with pressure of inspiration(Pi), after promptly adopting the spring force effect, no longer adopt intermediate pressure, so just avoided intermediate pressure cavity to the influence of compression process with owing to sealing the seal leakage problem that intermediate pressure cavity occurs.By optimal design, realized the optimization of contact force and vortex matter revolution dorsal part support force between non-revolution scroll and vortex matter revolution end face fully, promptly compressor operation is all realized stressed optimization under various operating modes.Spring force is simple and reliable for structure, and is with low cost, reduces greatly owing to adopt intermediate pressure cavity must adopt Sealing and high low pressure to separate manufacturing and the installation cost that dividing plate brought.
The present invention had both reduced manufacturing and purchase cost, simplified the structure again, had guaranteed reliability and the high efficiency of scroll compressor under commentaries on classics operating point for the national games simultaneously.
Description of drawings
Fig. 1 has the high back pressure structural representation of exhaust pressure back pressure chamber for vortex matter revolution dorsal part in the prior art.
Fig. 2 has the high back pressure structural representation of intermediate pressure back pressure chamber for vortex matter revolution dorsal part in the prior art.
Fig. 3 is the low back-pressure structure schematic representation that prior art mesoscale eddies spare tooth top is installed black box.
Fig. 4 has the low back-pressure structure schematic representation of intermediate pressure and exhaust pressure back pressure chamber for non-revolution scroll dorsal part in the prior art.
Fig. 5 only has the low back-pressure structure schematic representation of exhaust pressure back pressure chamber for non-revolution scroll dorsal part in the prior art.
Fig. 6 is a first embodiment of the invention sectional structure schematic representation.
Fig. 7 is the decomposition texture schematic representation of the spring mechanism in the first embodiment of the invention.
Fig. 8 is the partial schematic sectional view of the spring mechanism in the second embodiment of the invention.
Fig. 9 is the main force analysis schematic representation of non-revolution scroll among the present invention.
Figure 10 is the main force analysis schematic representation of vortex matter revolution among the present invention.
Figure 11 is stressed FA6 of axial contact and the axial normalization value comparison sheet that contacts stressed FA1～FA5 of the prior art among the present invention.
Figure 12 is that the present invention is at each running operating point scope schematic representation.
Annotate: the hyperbaric chamber structure is meant that motor is positioned at discharge pressure side, and the low-pressure cavity structure is meant that motor is positioned at the pressure of inspiration(Pi) side.
Among the figure: 1 is compressor, 2 is main casing, 3 is upper shell, 4 is recess, 5a is a lower shell body, 5b is a base, and 6 is last air guide joint, and 7 is exhaust manifolds, 8 are following air guide joint, 10 is frame, and 11 is main bearing, and 12 is secondary the support, 13 is stator, 14 are the oil return flat tube, and 15 is spill port, and 16 is supplementary bearing, 20 is bent axle, 22 is eccentric part, and 23 is the pressure of inspiration(Pi) back pressure cavity, and 28 is concentric hole, 29 is back pressure chamber, 30 is diametric hole, and 36 is rotor, and 38 is main equilibrium block, 40 is secondary equilibrium block, 41 is the top of frame, and 42 is exhaust chamber, and 43 is thrust bearing, 44 is vortex matter revolution, 44a is the end plate of vortex matter revolution, and 46 is the scrollwork of vortex matter revolution, and 48 is sliding bearing, 54 is the non-revolution scroll, 54a is the end plate of non-revolution scroll, and 54.1 for protruding downward key vertically with a pair of groove of cross slip ring accommodate a pair of that slide, and 54.2 is assembling groove, 56 is the scrollwork of non-revolution scroll, 65 is discharge passage, and 66 is the cross slip ring, and 67 is groove, 69 is the exhaust pressure back pressure cavity, 73 is black box, and 78 is key, and 505 is the exhaust pressure back pressure chamber among Fig. 5,100 is mounting mechanism, 100.1 be the positioning rod of mounting mechanism, 100.1.1 is the limited step on the positioning rod, 100.2 are short cover, 200 is pressure spring, 201 is Z type pressing plate, and 300 is butterfly spring, and 604-1 and 605-1 be the axial stress surface that contacts between vortex matter revolution and non-revolution scroll end face among presentation graphs 4 and Fig. 5 respectively, 604-2 and 605-2 be the axial stress surface that contacts between presentation graphs 4 and Fig. 5 mid frame and vortex matter revolution dorsal part respectively, FA1～FA6 contacts the stressed algebraic sum of axial contact that stress surface produces among presentation graphs 1～Fig. 6 respectively separately, axially contact force FA6=FN+Fb
The axial force that Fd--non-revolution scroll exhaust pressure back pressure cavity produces,
The active force that Fspring--non-revolution scroll dorsal part spring applies is decided by decrement, almost is steady state value.
The active force that Fus--non-revolution scroll dorsal part pressure of inspiration(Pi) back pressure cavity produces,
The axial force that Fbd--vortex matter revolution exhaust pressure back pressure cavity produces,
The active force that Fds-vortex matter revolution dorsal part pressure of inspiration(Pi) back pressure cavity produces,
Contact force between FN--non-revolution scroll and the vortex matter revolution,
The Fb--frame is to the support force of vortex matter revolution,
Fa--axial gas power,
Fr--radial gas power,
The tangential gas force of Ft--,
The centrifugal force of Fm--vortex matter revolution,
F ' t--bent axle is to the Driving force of vortex matter revolution, its size almost with the equating with joint efforts of Ft and Fr,
The Fgt--mounting mechanism is to the tangential reaction force of non-revolution scroll, its size almost with the equating with joint efforts of Ft and Fr,
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Referring to accompanying drawing 6-Figure 12, the housing of scroll compressor 1 comprises a cylindrical substantially main casing 2, and the top of main casing is welded with a upper shell 3, cup-shaped recess 4 of outwards outstanding formation in the middle of the top of upper shell.The bottom of main casing is welded with a lower shell body 5a and base 5b, and a plurality of installation feet are installed on the base, not shown whole installation feet.The last air guide joint 6 of a refrigeration agent is housed on the upper shell recess 4, a following air guide joint 8 also is housed on the main casing, 7 one of exhaust manifolds are installed in the air guide joint 6, and the other end is installed in down in the air guide joint 8.Other critical piece that is fixed on the main casing comprises: frame 10, and it suitably is fixed on the main casing; A pair that is positioned at bent axle 20 bottoms supports 12, and it has the leg that many radially outwards stretch out, and every leg also suitably is fixed on the main casing 2.Motor stator 13 with cardinal principle square cross section press fit in the main casing 2, therefore owing to formed path between square-section and circular section.An oil return flat tube 14 is installed in the spill port 15 of frame 10.
Its top has the live axle or the bent axle 20 of eccentric part 22, is rotatably supported in the main bearing 11 and the supplementary bearing 16 in the lower secondary support 12 in the frame 10.There is a concentric hole 28 that diameter is bigger the lower end of bent axle 20, and it is communicated with a smaller diameter bore 30 that extends up to the radially outward skew at bent axle top.Main casing is equipped with lubricant oil in 2 bottoms, and the blade that oils in concentric hole 28 and the hole is as a pump, to the pumping of the top of bent axle 20, makes lubricant oil enter diametric hole 30 and final arrival needs all parts of lubricating in the compressor lubricant oil.Bent axle 20 is driven by an electric motor rotation, and this motor comprises stator 13 and the rotor 36 that press fit on the bent axle 20, and rotor has secondary equilibrium block 40, is installed on the bent axle 20.
The top 41 of frame 10 is cylindrical, its upper surface and flat thrust bearing 43 lower surfaces join, the thrust bearing upper surface is supporting a vortex matter revolution 44, the scrollwork 46 that vortex matter revolution 44 has a common end plate 44a and stretches out from the upper surface of end plate.Cylindrical bosses is stretched out downwards from the lower surface of the end plate of vortex matter revolution 44, and a sliding bearing 48 is housed in it, and the eccentric part 22 of live axle 20 is installed in the bearing rotationally.
A non-revolution scroll 54, it has an end plate 54a and a quiet scrollwork 56 that from then on stretches out downwards, and quiet scrollwork 56 is positioned to be meshed with moving scrollwork 46 on the vortex matter revolution 44.On the non-revolution scroll 54 upper and lower elastic members that are set in slidably in the mounting mechanism 100, and can move axially within the specific limits.Elastic member comprises and passes the positioning rod 100.1 that non-revolution scroll 54 outer rims and frame 10 are joined, positioning rod is provided with positive stop lug boss 100.1.1, positive stop lug boss is positioned at non-revolution scroll 54 outer rims top, non-revolution scroll 54 outer rims are upper and lower to be set on the positioning rod 100.1 slidably, spring one end is crimped on non-revolution scroll 54 outer rims, and the other end is crimped on the limited step.
Spring is a pressure spring 200, see Fig. 6-Fig. 7, be provided with Z-shaped compressing piece 201 between positioning rod 100.1 and the pressure spring 200, this compressing piece one end is crimped on the positive stop lug boss 100.1.1 of positioning rod 100.1, the other end is crimped on pressure spring 200 the other ends, and pressure spring one end is crimped on non-revolution scroll 54 outer rims.Pressure spring 200 is arranged on positioning rod 100.1 next doors.Non-revolution scroll 54 outer rims are provided with the assembling groove 54.2 that holds pressure spring 200.This elastic member also comprises the short cover 100.2 that is set on the positioning rod 100.1, compressing piece 201 1 ends are crimped between the positive stop lug boss 100.1.1 of short cover 100.2 tops and positioning rod 100.1, short cover 100.2 bottoms and frame 10 are joined, non-revolution scroll 54 outer rims are upper and lower to be set on the short cover 100.2 slidably, compressing piece 201 the other ends are crimped on pressure spring 200 the other ends, and pressure spring 200 1 ends are crimped on non-revolution scroll 54 outer rims.
Spring also can be butterfly spring 300, sees Fig. 8, and this butterfly spring 300 is set on the positioning rod 100.1, and the one end is crimped on non-revolution scroll 54 outer rims, and the other end is crimped on the limited step 100.1.1.This elastic member also comprises the short cover 100.2 that is set on the positioning rod 100.1, the limited step 100.1.1 of short cover top and positioning rod 100.1 joins, bottom and frame 10 are joined, non-revolution scroll 54 outer rims are upper and lower to be set on the short cover 100.2 slidably, be set in outer butterfly spring 300 1 ends of short cover and be crimped on non-revolution scroll 54 outer rims, the other end is crimped on the limited step 100.1.1.
Above positioning rod is a screw rod.
When inwall or the outer wall upper and lower sliding pressure when touching of non-revolution scroll 54 dorsal parts by black box 73 and exhaust pressure back pressure cavity 69, the volume that non-revolution scroll 54 dorsal parts and upper shell 3 one common peripheral in a row go out the exhaust pressure back pressure cavity 69 of gas changes within the specific limits back and forth, presents elastic state.The exhaust pressure back pressure cavity be positioned at exhaust chamber 42 compressor lower motor side, that form by frame and main casing and black box sealing and be communicated with.
In order to prevent relatively rotating between vortex matter revolution 44 and the non-revolution scroll 54, be provided with cross slip ring 66, it around the cylindrical upper section 41 of frame 10 and be positioned at vortex matter revolution 44 end plate below.The cross slip ring is provided with pair of keys 78 (another key is not shown), this to key along the diametric(al) symmetry, and along compressor shaft to stretching out.With respect to two key central vertical directions a pair of groove (not shown) is arranged on the cross slip ring, this pair of keys 54.1 to groove and asymmetric scroll is slided and is accommodated.
The end plate 44a of vortex matter revolution 44 has a pair of outwardly directed flange portion, has a groove of opening outwardly on each flange portion.Groove is dimensioned to and can accommodates corresponding key 78 slidably.Key 78 has a suitable axial length or a height, stretches out the upper surface of vortex matter revolution 44 end plates to prevent it.
The following describes its working principle.At first, by motor rotating driveshaft or bent axle 20, the eccentric part 22 of this bent axle 20 via sliding bearing 48, passes to vortex matter revolution 44.Vortex matter revolution 44 is the center with the axis of non-revolution scroll 54, sets the turning radius of eccentric distance and does translational motion.When bent axle 20 rotatablely moves, by cross slip ring 66 constraint vortex matter revolutions 44, make its not rotation, translational motion by vortex matter revolution 44, the pressing chamber that between the crimping of non-revolution scroll 54 and vortex matter revolution 44, forms continuous to central mobile, along with moving, the volume of pressing chamber dwindles continuously.
When compression process just begins, because the volume of pressing chamber dwindles continuously, pressure in it raises, compressed fluid produces axial force disconnected from each other to vortex matter revolution 44 and non-revolution scroll 54, this active force forces vortex matter revolution 44 to abut against on the outstanding thrust bearing 43 in frame 10 centers, simultaneously non-revolution scroll 54 is produced end thrust upwards, this moment is because the fluid of discharging from discharge passage 65 flows into top exhaust pressure back pressure cavity 69, the active force that hydrodynamic pressure in it and pressure of inspiration(Pi) back pressure cavity and length of spring compressed produce acts on the dorsal part of non-revolution scroll 54, forces the end plate face of non-revolution scroll 54 to abut against on the end plate face of vortex matter revolution 44.
Compress the fluid that sucks from suction port in each pressing chamber successively, compressed fluid is discharged from discharge passage 65.The fluid of discharging flow in the top exhaust pressure back pressure cavity 69, makes that discharging fluid is lowered through the noise that discharge passage 65 produces.Discharge fluid and carry out heat exchange, make that discharging fluid is removed the parts of lubricating oil of carrying in the discharge fluid by cooling by housing and external environment.Fluid in exhaust pressure back pressure cavity 69 is discharged in the lower housing portion high pressure gas chamber 42 through the exhaust manifolds 7 that are communicated with bottom high pressure gas chamber 42, guiding by the exhaust stator makes air-flow along the wall cooling motor that flows downward, and then the upwards mobile cooling motor in the bottom from symmetry direction from motor, in its flow process, motor in supercooling high pressure gas chamber 42 and temperature raise, discharge from discharge tube at last, for example supply with freeze cycle, finish the circulation of refrigerant fluid in compressor.
Lubricant oil is stored in the bottom of lower shell body 5a, and pressure on every side becomes head pressure.The pressure of inspiration(Pi) back pressure cavity 23 interior pressure that formed by frame 10, bent axle 20, non-revolution scroll 54, vortex matter revolution 44 are lower than head pressure, the assembly that oils is made up of the last oil pipe line and the blade that oils, last oil pipe line is arranged in the bent axle, the blade that oils is arranged on the oil pipe line bottom, offers one and above oil supply hole on the end plate of vortex matter revolution 44.Be stored in the lubricant oil of the bottom of lower shell body 5a,, upwards flow along bent axle by being arranged on concentric hole 28 and the diametric hole 30 on the bent axle 20.Parts of lubricating oil is by being located at the horizontal oilhole on the bent axle 20, on one side lubricated main bearing 11, arrive back pressure chamber 29 on one side.In addition, other lubricant oil arrives the eccentric part of bent axle 20 by concentric hole 28 and diametric hole 30, and lubrication sliding bearing 48 enters back pressure chamber 29 then.In addition, lubricant oil enters back pressure chamber 29 after by main bearing 11 and sliding bearing 48.Enter the lubricant oil of back pressure chamber 29, in the thrust bearing 43 surface translation processes of relative frame 10, lubricant oil is brought into pressure of inspiration(Pi) back pressure cavity 23 by vortex matter revolution 44.Herein, lubricant oil is by throttling, enters pressure of inspiration(Pi) back pressure cavity 23 and is blended in the suction fluid of pressure of inspiration(Pi) back pressure cavity 23, is inhaled into then to enter in the pressing chamber.In addition, be opened in oil supply hole in vortex matter revolution 44 end plates, be arranged on the position that chamber begins to compress about 180 degree angles, back, the lubricant oil that makes gas come from the end plate oil supply hole when compression can lubricate scrollwork and end face, to reduce compression power consumption, reduce the pressurized gas temperature, thereby realize the efficient and high reliability of compressor.
From the lubricant oil that discharge passage 65 is discharged, a part enters freeze cycle from discharge tube, and another part then separates with refrigeration agent in top exhaust pressure back pressure cavity 69 and bottom high pressure gas chamber 42 respectively, is stored in the bottom of lower shell body 5a.
Fluid in non-revolution scroll 54 and the pressing chamber produces the downward axial pressure that presses the flat thrust shaft bearing surface 43 in frame 10 centers to vortex matter revolution 44, the pressure of back pressure chamber 29 produces end thrust upwards to vortex matter revolution 44 simultaneously, this thrust that makes progress has been offset most of downward axial pressure, thereby reduced the friction between the flat thrust shaft bearing surface 43 of the end plate of vortex matter revolution 44 and frame 10, consequently reduce the power consumption of motor, improve the performance of compressor.
For setting up back pressure chamber at non-revolution scroll 54 dorsal parts, guarantee the low back-pressure structure of non-revolution scroll 54 axial floats, the front is addressed, as accompanying drawing 4 and shown in Figure 5, because the dorsal part of vortex matter revolution 44 is the pressure of inspiration(Pi) of low pressure, therefore the holder power that makes progress of its generation make that the throw-on pressure of 44 pairs of frames of vortex matter revolution is very big much smaller than the higher back side pressure of non-revolution scroll 44 dorsal parts, friction power loss increases, and causes performance to reduce.From Figure 11, can obviously find out, when low back-pressure structure only adopts exhaust pressure and pressure of inspiration(Pi) as the throw-on pressure of non-revolution scroll dorsal part, when operating mode changes, the corresponding Figure 11 abscissa 1～10 of 1～10 operating point among Figure 12, axially loaded FA changes quite violent, greatly reduces compressor efficiency and reliability; Do the time spent when adopting intermediate pressure cavity+discharge plenum+suction plenum, though can optimize preferably to axially loaded, but owing to increased intermediate pressure cavity, itself and compression chamber generation mass exchange, improve the pressure of compression process and increased compression power consumption, and intermediate pressure cavity needs well sealing, has increased leakage and cost of material.
For setting up back pressure chamber at vortex matter revolution 44 dorsal parts, guarantee the high back pressure structure of vortex matter revolution 44 axial floats, the front is addressed, because the action radius of back side pressure is less, approximate the radius of vortex matter revolution 44, for the moment that satisfies its generation greater than tilting moment, then back side pressure must be very big.Thereby make that the axial contact force between vortex matter revolution 44 and the non-revolution scroll 54 is very big, because this contact force produces sliding friction on the end plate face of non-revolution scroll 54 and vortex matter revolution 44, under the excessive situation of contact force, friction power loss increases more, causes performance to reduce.
For tooth top the scroll compressor structure that black box prevents the leakage of fluid in the compression process is installed at the scrollwork of vortex matter revolution and non-revolution scroll, it is same because the action radius of vortex matter revolution dorsal part is less, axial gas power must design very greatly to guarantee in the operation process vortex matter revolution motion of not toppling, the active force of vortex matter revolution dorsal part is just bigger like this, cause friction power loss very big, and because tooth top black box sealing effect is limited, reduce compression efficiency greatly, cold is reduced and the power consumption increase, compressor efficiency is low.
Scroll compressor of the present invention, the area of the area of the back pressure chamber of non-revolution scroll 54 dorsal parts and vortex matter revolution 44 dorsal part back pressure chamber is suitable, non-revolution scroll 54 and vortex matter revolution 44 are in separately back pressure chamber internal pressure, and under the effect of non-revolution scroll dorsal part spring force, make non-revolution scroll 54 be pressed against vortex matter revolution 44 on the frame 10.The runner plate face of vortex matter revolution 44 is pressed against on the frame 10, if vortex matter revolution 44 topples, then tilting moment must compress the moment of vortex matter revolution 44 to the supporting surface of frame 10 greater than what made a concerted effort to produce by the contact force between two scroll and other, because the acting force arm of contact force is long, it approximates the radius of radius+frame 10 supporting surfaces of vortex matter revolution 44, therefore just can guarantee this moment greater than tilting moment under the less situation of contact force, guarantee that promptly vortex matter revolution 44 does not topple.Increase spring force as the 3rd axial throw-on pressure after, when operating mode changes, as from little pressure ratio operating point 5 or 6 to big pressure ratio operating point 7 or 8 o'clock, it is less to guarantee axially to contact stressed fluctuation ratio, as can see from Figure 11, spring force+exhaust pressure+pressure of inspiration(Pi) scheme does not indicate the pressure of inspiration(Pi) part among the figure, promptly only indicate FA6 (high back pressure) exhaust pressure+spring force among the figure; Axially contact force is an optimal case in each scheme, not only on declared working condition point 10 and 11, axially contact stressed very little, and in whole running operating mode scope equal can guarantee very little.Adopt scroll compressor of the present invention, simple in structure, cost is low, can preferably be optimized at the compressor condition scope internal friction of changing a job for the national games, therefore can obtain efficient and the reliable all very high novel scroll formula compressor of type.
In sum, the active force of the non-revolution scroll dorsal part among the present invention comprises that also the spring force that is produced by several length of spring compressed is as the 3rd axial throw-on pressure except the first and second downward axial throw-on pressures by pressure of inspiration(Pi) and exhaust pressure generation that separated by black box; The active force of vortex matter revolution dorsal part comprises the active force that the pressure of inspiration(Pi) that separated by black box and exhaust pressure produce.Vortex matter revolution and non-revolution scroll closely contacts under the effect of making a concerted effort of dorsal part separately and realize axial seal, are used for that the non-revolution scroll is installed to mounting mechanism on the frame and allow to do vertically after the installation of non-revolution scroll certain unsteady.Act on non-revolution scroll dorsal part by spring force as the 3rd throw-on pressure, realized acting under the condition of non-revolution scroll dorsal part at no intermediate pressure, the optimization of contact force and vortex matter revolution dorsal part support force between non-revolution scroll and vortex matter revolution end face, promptly compressor operation is all realized stressed optimization under various operating modes; Owing to press the influence of chamber in not having, farthest realized the high efficiency of compression to compressor compresses process and the chamber seal leakage of middle pressure.Adopt the present invention, reduced manufacturing and purchase cost, simplify the structure, guaranteed reliability and the high efficiency of scroll compressor under commentaries on classics operating point for the national games.
Claims (9)
1. scroll compressor comprises the housing of compressor (1); And non-revolution scroll (54), its vortex shape crimping (56) is arranged on the end plate (54a), and end plate is arranged on around the crimping, and is connected with the front end of crimping; Vortex matter revolution (44), its vortex shape crimping (46) is arranged on the end plate (44a); The crimping of non-revolution scroll and vortex matter revolution is combined to form a plurality of pressing chambers; Be used to support the frame (10) of vortex matter revolution; By the driving bent axle (20) that the main bearing in the frame (11) supports, its driving is connected to vortex matter revolution, makes revolution motion to drive vortex matter revolution with respect to the non-revolution scroll; Be used for the non-revolution scroll is installed to mounting mechanism (100) on the frame; Be used for preventing the cross slip ring (66) of vortex matter revolution rotation; Non-revolution scroll dorsal part and upper shell surround the exhaust pressure back pressure cavity (69) of flexible discharge gas jointly, non-revolution scroll dorsal part touches by the inwall sliding pressure of black box (73) and exhaust pressure back pressure cavity, the exhaust pressure back pressure cavity be positioned at exhaust chamber (42) compressor lower motor side, that form by frame and main casing and black box and be communicated with; It is characterized in that on the upper and lower elastic member that is set in slidably in the mounting mechanism of non-revolution scroll, and can move axially within the specific limits.
2. scroll compressor according to claim 1, it is characterized in that described elastic member comprises passes the positioning rod (100.1) that non-revolution scroll outer rim and frame are joined, positioning rod is provided with positive stop lug boss (100.1.1), positive stop lug boss is positioned at non-revolution scroll outer rim top, non-revolution scroll outer rim is upper and lower to be set on the positioning rod slidably, spring one end is crimped on the non-revolution scroll outer rim, and the other end is crimped on the limited step.
3. scroll compressor according to claim 2 is characterized in that described spring is butterfly spring (300), and butterfly spring is set on the positioning rod, and the one end is crimped on the non-revolution scroll outer rim, and the other end is crimped on the limited step.
4. scroll compressor according to claim 3, it is characterized in that described elastic member also comprises the short cover (100.2) that is set on the positioning rod, the limited step of short cover top and positioning rod joins, bottom and frame are joined, the upper and lower weak point that is set in slidably of non-revolution scroll outer rim puts, be set in outer butterfly spring one end of short cover and be crimped on the non-revolution scroll outer rim, the other end is crimped on the limited step.
5. scroll compressor according to claim 2, it is characterized in that described spring is pressure spring (200), be provided with compressing piece (201) between positioning rod and the pressure spring, this compressing piece one end is crimped on the positive stop lug boss of positioning rod, the other end is crimped on the pressure spring the other end, and pressure spring one end is crimped on the non-revolution scroll outer rim.
6. scroll compressor according to claim 5 is characterized in that described compressing piece is Z-shaped, and pressure spring is arranged on the positioning rod next door.
7. scroll compressor according to claim 5 is characterized in that described non-revolution scroll outer rim is provided with the assembling groove (54.2) that holds pressure spring.
8. scroll compressor according to claim 5, it is characterized in that described elastic member also comprises the short cover (100.2) that is set on the positioning rod, short cover top and compressing piece one end join, compressing piece one end is crimped on the positive stop lug boss of positioning rod, short cover bottom and frame are joined, the upper and lower weak point that is set in slidably of non-revolution scroll outer rim puts, and the compressing piece the other end is crimped on the pressure spring the other end, and pressure spring one end is crimped on the non-revolution scroll outer rim.
9. the method for operation of scroll compressor according to claim 1, it is characterized in that at non-revolution scroll (54) dorsal part except the first downward axial throw-on pressure and the second axial throw-on pressure that the pressure of inspiration(Pi) back pressure cavity (23) that adopts black box (73) and separate and exhaust pressure back pressure cavity (69) produce respectively, adopt spring force that one and above length of spring compressed produce as the 3rd axial throw-on pressure, these three axial throw-on pressure actings in conjunction are in the dorsal part of non-revolution scroll, make the non-revolution scroll vortex matter revolution is pressed against on the top (41) of frame (10), the non-revolution scroll closely contacts realization axial seal with vortex matter revolution, and the non-revolution scroll can move axially within the specific limits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100292907A CN101324233A (en) | 2008-07-01 | 2008-07-01 | Scroll compressor and operation mode thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100292907A CN101324233A (en) | 2008-07-01 | 2008-07-01 | Scroll compressor and operation mode thereof |
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| Publication Number | Publication Date |
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| CN101324233A true CN101324233A (en) | 2008-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100292907A Pending CN101324233A (en) | 2008-07-01 | 2008-07-01 | Scroll compressor and operation mode thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574618A (en) * | 2014-10-07 | 2017-04-19 | 松下知识产权经营株式会社 | Scroll compressor |
| US12264674B2 (en) | 2022-10-28 | 2025-04-01 | Hangzhou Lvneng New Energy Vehicle Parts Co., LTD. | Axially flexible compressor |
-
2008
- 2008-07-01 CN CNA2008100292907A patent/CN101324233A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574618A (en) * | 2014-10-07 | 2017-04-19 | 松下知识产权经营株式会社 | Scroll compressor |
| CN106574618B (en) * | 2014-10-07 | 2019-09-20 | 松下知识产权经营株式会社 | Scroll compressor |
| US12264674B2 (en) | 2022-10-28 | 2025-04-01 | Hangzhou Lvneng New Energy Vehicle Parts Co., LTD. | Axially flexible compressor |
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