CN105986996A - Scroll compressor having a plurality of scroll members - Google Patents
Scroll compressor having a plurality of scroll members Download PDFInfo
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- CN105986996A CN105986996A CN201510055931.6A CN201510055931A CN105986996A CN 105986996 A CN105986996 A CN 105986996A CN 201510055931 A CN201510055931 A CN 201510055931A CN 105986996 A CN105986996 A CN 105986996A
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- boss
- pressure
- recess
- containment member
- scroll element
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Abstract
A scroll compressor, comprising: a housing; a compression mechanism including a fixed scroll member and a movable scroll member; a partition plate disposed in the housing and adjacent to the non-orbiting scroll member, a first boss being provided on a lower surface of the partition plate; a first seal member having a first extension configured to abut a lower end face of the first boss of the partition and a second extension configured to abut an annular wall of the first recess of the non-orbiting scroll member to separate a first pressure region from a second pressure region within the casing; a first resilient member disposed in the first recess to maintain the first sealing member pressed against the first boss, the non-orbiting scroll member being transitionable between a non-unloaded state and an unloaded state, the first boss being maintained pressed against the first sealing member such that the first sealing member is not squeezed out or ejected by pressure in the pressure region when the non-orbiting scroll member is in the non-unloaded state, the first boss being maintained pressed against the first sealing member and having a lower end surface at least in the first recess when the non-orbiting scroll member is in the unloaded state.
Description
Technical field
The present invention relates to a kind of screw compressor.
Background technology
The content of this part provide only the background information relevant to the disclosure, and it may be not intended that
Prior art.
Owing to screw compressor has extremely efficient ability to work, thus screw compressor is more prevalent
Ground is used as the compressor in refrigeration system and HVAC system.Normally, screw compressor includes
With determine dynamic scroll element that scroll element is engaged with each other to form a series of compression chamber.Dynamic scroll portion
Part makes the size of compression chamber be gradually reduced relative to the rotation determining scroll element and causes being assigned to often
The fluid of individual intracavity is compressed.
There is outermost radial outside in a series of compression chambers of screw compressor is in pressure of inspiration(Pi)
Low pressure chamber, radially inner most be in the high pressure chest of pressure at expulsion, cavity pressure is in pressure of inspiration(Pi)
Middle pressure chamber between power and pressure at expulsion.The side of the end plate determining scroll element is provided with recess,
This recess and dividing plate cooperatively form the chamber substantially closed, this chamber and middle pressure chamber fluid communication thus
Be formed as determining scroll element and the back pressure cavity of back pressure is provided.So, the top determining scroll element can be in
In three kinds of different pressure spans, i.e. the periphery determining scroll element is in suction pressure region (i.e.,
Low-pressure side region), the back pressure cavity of determining scroll element is in medium voltage side region and determines scroll element
Exhaust ports is in pressure at expulsion region (that is, region, high-pressure side).
Operationally, its interior cold-producing medium sucks, through overcompression screw compressor from low-pressure side region
Region, high-pressure side, and this medium voltage side region during refrigerant compression is discharged by by air vent
There is provided back pressure to be pressed against determining scroll element towards dynamic scroll element, but, if these three is different
Pressure span between exist leakage, then can cause compressor performance reduce, delivery temperature rise high
Problem.To this end, have employed sealing structure between these three pressure span, so that this is reduced or eliminated
Leakage between three pressure spans.It is used for isolating and sealing the sealing structure of these three pressure span
Generally there is floating seal coil structures peace top ring structure.Floating seal coil structures is by by two pieces
The sealing ring that metallic plate is fixed realizes sealing, and flat-top seal coil structures is by by spring-supported close
Seal realizes sealing.
However it remains for improving the sealing property of sealing structure, reducing screw compressor
The demand of the aspects such as the assembly difficulty of manufacturing cost or reduction screw compressor.
Summary of the invention
It is an object of the present invention to provide one and can make in compressor between different pressures region
The significantly improved screw compressor of sealing property.
A further object of the present invention is to provide a kind of screw compressor adapting to bigger upper punch distance.
It is a further object to provide the whirlpool that a kind of manufacturing cost is lower, assembly difficulty reduces
Rotation compressor.
One or more purposes in achieve these goals, according to the one of embodiment of the present invention
Individual aspect, it is provided that a kind of screw compressor, comprising: housing；It is arranged in described housing
Compression mechanism, described compression mechanism is suitable to compression work fluid and includes determining scroll element and dynamic whirlpool
Rotation parts；Dividing plate, determines scroll element in described dividing plate is arranged on described housing and adjacent to described,
The lower surface of described dividing plate is provided with the first boss；First containment member, described first seals
First extension of component be configured to described first boss against described dividing plate lower surface and
Second extension of described first containment member is configured to determine the first recessed of scroll element against described
The annular wall in portion is to realize sealing, thus by first pressure with different pressures in described housing
Region separates with the second pressure span；And first elastic component, described first elastic component is arranged
In described first recess, so that described first containment member is remained held against described first boss
On, wherein, described determine scroll element and can change between non-offloaded state and unloaded state, when
Described determining scroll element when being in described non-offloaded state, described first boss is kept pressed against described
One containment member makes described first containment member will not be by described first pressure span and described
Pressure extrusion in the pressure span that in two pressure spans, pressure is bigger or ejection, when described fixed
When scroll element is in described unloaded state, described first boss is kept pressed against described first and seals structure
The described lower surface of part and described first boss is at least in described first recess.
Accompanying drawing explanation
By description referring to the drawings, the feature of one or several embodiment of the present invention and
Advantage will become better understood by.Accompanying drawing as described herein be only in order at illustration purpose and not
Being intended to limit the scope of the present invention by any way, accompanying drawing is not necessarily drawn to scale, and some are special
Levy the details that may be exaggerated or minimized to show particular elements.In the accompanying drawings:
Fig. 1 is the longitudinal section of conventional screw compressor；
Fig. 2 is that the partial enlargement of the sealing structure of the conventional screw compressor shown in Fig. 1 regards
Figure；
Fig. 3 is the size relationship relevant to the axial seal gap sealing structure shown in Fig. 2
Explanatory view；
Fig. 4 is the broken section of the sealing structure of the screw compressor of first embodiment of the present invention
Figure；
Fig. 5 is the size relationship relevant to the radial seal gap sealing structure shown in Fig. 4
Explanatory view；
Fig. 6 A to Fig. 6 B shows that sealing structure in Fig. 4 is respectively at non-unloading determining scroll element
Partial sectional view when load state and unloaded state；
Fig. 7 is the broken section of the sealing structure of the screw compressor of second embodiment of the present invention
Figure；
Fig. 8 is the enlarged partial sectional view of the sealing structure in Fig. 7.
Detailed description of the invention
The description of embodiment each to the present invention below is merely exemplary, and is definitely not the present invention
And apply or the restriction of usage.Use identical reference to represent identical in various figures
Parts, the structure of thus like parts will not be repeated again.
First total structure and the operation logic of the screw compressor of routine will be described with reference to Fig. 1.As
Shown in Fig. 1, screw compressor 100 (the most also can be referred to as compressor) generally comprises shell
Body 110.Housing 110 can include the body 111 of general cylindrical shape, be arranged on body 111 one end
Top cover 112 and be arranged on the bottom 114 of body 111 other end.Compressor 100 includes setting
Put the compression mechanism in housing 110, this compression mechanism compression work fluid and include determining vortex
Parts 150 and dynamic scroll element 160.Compressor 100 also includes that dividing plate 116, dividing plate 116 set
Put in housing 110 and adjacent to determining scroll element 150, such as, dividing plate 116 is arranged on top cover
Between 112 and body 111, (being to extend along substantially horizontal direction in FIG) is with by compressor
Inner space be separated into region, high-pressure side and low-pressure side region (the two be also referred to as the first pressure span
Or the 3rd pressure span).It is provided with in low-pressure side region for sucking fluid (also referred to as workflow
Body), the inlet suction port 118 of such as gaseous refrigerant, be provided with for discharging pressure in region, high-pressure side
The exhaust joint 119 of the fluid after contracting.Housing 110 is provided with by stator 122 and rotor 124
The motor 120 constituted.Rotor 124 is provided with drive shaft 130 and moves scroll element 160 to drive,
Thus the working fluid between scroll element 150 and dynamic scroll element 160 is determined in compression.Dynamic scroll portion
Part 160 includes end plate 164, the hub portion 162 being formed at end plate 164 side and is formed at end plate
The spiral helicine blade 166 of 164 opposite sides.Determine scroll element 150 to include end plate 154, be formed at
The spiral helicine blade 156 of end plate 154 side and be formed at the recess of end plate 154 opposite side
158.It is formed with air vent 152 in the substantial middle position of end plate 154.Around air vent 152
Space also constitute region, high-pressure side.Determining the helical blade 156 of scroll element 150 and dynamic vortex
Formed between the helical blade 166 of parts 160 a series of volume from radial outside to radially inner side by
The least compression chamber C1, C2 and C3.Wherein, the compression chamber C1 of outermost radial outside is for being in
The low pressure chamber of pressure of inspiration(Pi), the compression chamber C3 of radially inner most is the high pressure chest being in pressure at expulsion.
Middle compression chamber C2 is between pressure of inspiration(Pi) and pressure at expulsion, thus middle pressure chamber.
Thus, be internally formed three kinds of different pressure chambers in compression mechanism: low pressure chamber, middle pressure chamber with
And high pressure chest.
The side of dynamic scroll element 160 is supported by the top (i.e. supporting part) of main bearing seat 140,
One end of drive shaft 130 is supported by the base bearing 144 being arranged in main bearing seat 140.Drive shaft
Described one end of 130 is provided with eccentric crank pin 132, in eccentric crank pin 132 and dynamic scroll portion
Unloading lining 142 it is provided with between the hub portion 162 of part 160.By the driving of motor 120, dynamic
Scroll element 160 (that is, will move scroll element 160 relative to determining scroll element 150 translation rotation
Central axis rotate around the central axis determining scroll element 150, but dynamic scroll element 160
Body will not rotate around the central axis of self) to realize the compression of fluid.Above-mentioned translation rotation is logical
Cross what the cross slip-ring 180 determining to arrange between scroll element 150 and dynamic scroll element 160 realized.
Fluid after determining scroll element 150 and dynamic scroll element 160 compression is by air vent 152 row
Go out to region, high-pressure side.In order to prevent the fluid in region, high-pressure side under specific circumstances via air vent
152 are back to low-pressure side region, can arrange check valve or air bleeding valve (not at air vent 152
Illustrate).
In order to realize the compression of fluid, determine the top of helical blade 156 of scroll element 150 (also
Be referred to as and determine the distal portion of scroll element) and the end plate 164 of dynamic scroll element 160 between and dynamic whirlpool
The top (the also referred to as distal portion of start scroll element) of the helical blade 166 of rotation parts 160 is with fixed
Axial seal is needed between the end plate 154 of scroll element 150.It addition, dividing plate 116 with determine vortex
It is also required between parts 150 seal.To this end, generally arrange in the recess determining scroll element 150
Seal structure S.
Describe sealing structure S of existing compressor presently in connection with Fig. 2 in detail, seal structure S and arrange
At dividing plate 116 and determine between scroll element 150.Seal structure S include outer seal member S1,
Outer spring S2, interior containment member S3 and inner spring S4.It is arranged on scroll compression when sealing structure S
Time in machine 100, define three between the top of scroll element 150 and the bottom of dividing plate 116 determining
Individual different pressure span: low-pressure side region LA, medium voltage side region MA and region, high-pressure side HA.
Wherein, the housing 110 below dividing plate 116 and the space formed between compression mechanism constitute low
Pressure side region LA, by the steam vent being communicated to exhaust joint 119 determining scroll element 150 top
And composition high-pressure side, the space region HA formed between dividing plate 116, and by determining scroll element 150
Top on recess 158 and the bottom of dividing plate 116 between the space that formed constitute medium voltage side district
Territory MA.It will be appreciated by persons skilled in the art that the mesh that medium voltage side region MA is provided
Be to provide back pressure to determining scroll element 150.Owing to the side of dynamic scroll element 160 is by leading
The supporting part of bearing block 140 supports, so utilizing the pressure in the MA of medium voltage side region can be effective
Scroll element 150 will be determined and dynamic scroll element 160 forces together in ground, and this state can referred to as be determined
The non-offloaded state of scroll element 150.When the pressure in each compression chamber exceedes setting value, this
Pressure in a little compression chambers will exceed the pressure down provided in the MA of medium voltage side region produced making a concerted effort
Power is so that determine scroll element 150 and move upward.Now, the fluid in compression chamber will be by fixed
Between top and the end plate 164 of dynamic scroll element 160 of the helical blade 156 of scroll element 150
Gap and dynamic scroll element 160 helical blade 166 top with determine scroll element 150
Clearance leakage between end plate 154 to realize unloading, thus is screw compressor to low-pressure side region
Providing axial elasticity (also referred to as POP OFF), this state also referred to as determines scroll element 150
Unloaded state.
For sealing structure S, outer seal member S1 and the axial displacement of interior containment member S3
Limited by dividing plate 116.Scroll element 150 axle is determined during this axial elasticity is provided
To having moved up certain upper punch distance (also referred to as POP OFF distance), hereinafter referred to as away from
From POP, therefore, (that is, it is in determining scroll element 150 when compressor 100 is properly functioning
During non-offloaded state), need on the dividing plate 116 of compressor 100 and the top determining scroll element 150
Portion leaves the certain interval C being at least greater than or equal to this distance POP, to prevent from providing this
Determine during axial elasticity to occur to do with end plate 116 when scroll element 150 moves axially upwards
Relate to, in other words, if gap reserved between dividing plate 116 and the top determining scroll element 150
C is less than above-mentioned distance POP, then (that is, determining vortex during providing this axial elasticity
When parts 150 are in unloaded state) determine scroll element 150 will collide with dividing plate 116 and then
Affect properly functioning some parts even damaging compressor 100 of compressor 100.At compressor
In the running of 100, this preset clearance C is by outer seal member S1 and interior containment member S3
Seal.
Describe in detail in compressor relevant to preset clearance C (axial seal gap) with reference to Fig. 3
, in the manufacture and assembling process of compressor 100, there is following foozle in size relationship: fixed
The upper surface at the top of scroll element 150 is away from the distance determined between scroll element 150 lower surface, i.e.
Determining the foozle that the axial height of scroll element 150 exists in the fabrication process, it is in figure 3
By Tor1Represent；Dynamic scroll element 160 with determine the upper surface that scroll element 150 lower surface coordinates
Between the lower surface that the thrust surfaces with main bearing seat 140 away from dynamic scroll element 160 coordinates away from
From the error existed in the fabrication process, it is in figure 3 by Tor2Represent；Body 111 with every
The upper surface distance bottom body 111 of plate 116 contact, the i.e. axial height of body 111 exist
Foozle present in manufacture process, it is in figure 3 by Tor3Represent；Dividing plate 116 with close
The lower surface of envelope component contact distance between the end face that dividing plate 116 contacts with body 111 is in system
Making error present in process, it is in figure 3 by Tor4Represent.
It addition, in the assembling and running of compressor 100, dividing plate 116 is being assembled into housing
Can produce scale error because of welding deformation during 110, it is in figure 3 by Tor5Represent,
And, dividing plate is as the pressure produced in compressor 100 running changes and deforms
Thus producing scale error, it is in figure 3 by Tor6Representing, these all can cause determining scroll element
Distance between top and the dividing plate 116 of 150 changes.
Error that multiple parts in compressor 100 exist in the fabrication process and dividing plate 116
The scale error of above-mentioned deformation generation, i.e. Tor1～Tor6Make when setting preset clearance C necessary
Considering these scale errors, these scale errors are Tor1～Tor6The tolerance range sum of composition.Remove
Outside this, this preset clearance C must also be at least greater than or equal to distance POP.
Therefore, in order to ensure containment member, preset clearance C is fully sealed, the minimum of containment member
Thickness TminHave to be larger than the maximal clearance C of preset clearance Cmax, otherwise, containment member in
It is easy to be extruded or eject under pressure effect in pressure chamber MA or high pressure chest HA.It addition, it is pre-
Stay minimum clearance C of clearance CminHave to be larger than ultimate range POP of distance POPmax, otherwise,
During axial elasticity is provided, determine scroll element 150 to collide with dividing plate 116.Wherein,
The maximal clearance C of preset clearance CmaxMinimum clearance C equal to preset clearance CminAdd
Tor1～Tor6The summation that the tolerance range sum of composition is constituted.It is to say, at design containment member
Time, it is necessary to make the minimum thickness T of containment memberminMore than ultimate range POPmaxAdd
Tor1～Tor6The summation that the tolerance range sum of composition is constituted.
But, determine, when providing axial elasticity, distance POP that scroll element 150 moves axially upwards
In the case of relatively big, such as, the feelings of bigger POP distance are needed at certain types of compressor
Under condition, due to the minimum thickness T of containment memberminWith ultimate range POPmaxAnd Tor1～Tor6
Relation between the tolerance range of composition, the thickness that can cause containment member is excessive, and containment member
Thickness is excessive, can affect sealing property, and such as, containment member thickness is excessive, need greatly by
The edge of containment member is pressed against dividing plate and determines on scroll element by pressure, and in medium voltage side region
Pressure do not reach this by the case of pressure, the even pressure in region, high-pressure side do not reaches yet
This can not be close proximity to dividing plate by the edge that can cause containment member in the case of pressure and be determined vortex
Parts, this so that can cause compress the fluid ovfl from containment member thus affect sealing
Energy.Therefore, the design for suitable thickness containment member greatly receives above-mentioned distance POP
And by Tor1～Tor6The restriction of the tolerance range of composition.
For the screw compressor of a certain type, distance POP is usually fixed, therefore,
The thickness being it desired to containment member is the most relatively thin, then must reduce by Tor1～Tor6The public affairs of composition
The impact that difference band causes, in other words, it is necessary to reduce each error constituting tolerance range, i.e. must carry
The assembling essence of the high accuracy of manufacture determining the parts such as scroll element, dividing plate and housing and these parts
Degree, and this also manufacturing cost and assembling thereof to screw compressor have higher requirement and choose
War.
The screw compressor of first embodiment of the present invention is described referring now to Fig. 4 to Fig. 6 B
Seal structure S100, and compare sealing structure S100 of the first embodiment with existing with reference to Fig. 5
Sealing structure S of technology.
Fig. 4 shows the local of the sealing structure of the screw compressor of first embodiment of the present invention
Sectional view, Fig. 5 shows the chi relevant to the radial seal gap sealing structure shown in Fig. 4
The explanatory view of very little relation, Fig. 6 A to Fig. 6 B shows that the sealing structure in Fig. 4 is determining whirlpool
Rotation parts are respectively at partial sectional view when non-offloaded state and unloaded state.
With reference to Fig. 4, sealing structure S100 of screw compressor includes the first containment member S110,
This first containment member S110 can be the most such as exterior seal ring S110, outer close
The first extension S111 of seal S110 is configured to against first on the lower surface of dividing plate 116 convex
The lower surface of platform 1161 is to realize sealing, and the second extension S112 of exterior seal ring S110 is configured to
Annular wall 157, the most such as against the first recess 158 determining scroll element 150
Can be against the circumferential inner surface of annular wall 157 to realize sealing, thus by the tool in screw compressor
The first pressure span having different pressures separates with the second pressure span.In the present embodiment, first
Pressure span and the second pressure span such as can be respectively but be not limited to low-pressure side region LA and middle pressure
Side region MA.Seal structure S100 and also include the first elastic component S120, the first elastic component S120
It is arranged in the first recess 158, so that the first containment member S110 is remained held against the first boss 1161
On.Determine scroll element 150 can change with unloaded state in non-offloaded state, when determining scroll element 150
When being in non-offloaded state, the first boss 1161 is kept pressed against the first containment member S110 and makes first
Containment member S110 will not be extruded by the pressure in the second pressure span MA or eject, such as Fig. 4 and
Shown in Fig. 6 A.When determining scroll element 150 and being in unloaded state, the first boss 1161 is kept pressed against
The lower surface of the first containment member S110 and the first boss 1161 is at least in the first recess 158,
As shown in Figure 6B.Wherein, scroll element 150 is determined when unloaded state relative in non-offloaded state
In axial direction move up distance POP, as shown in Figure 6B.Although it is pointed out that
Fig. 6 B determines the annular wall 157 of scroll element 150 upper surface and end plate 116 in the face of annular wall
The lower surface of the described upper surface of 157 is spaced apart, but this distance can be close to zero
The upper surface wanting annular wall 157 does not contact this lower surface of end plate 116.
In the first embodiment, by sealing this layout of structure S100 so that need by sealing
The gap that component carries out sealing is converted to radial clearance Cr by axial gap C of prior art, such as Fig. 5
Shown in, need the outer radial periphery face that this radial clearance Cr is the first boss 1161 carrying out sealing with fixed
Radial clearance between the radially inner circumference face of the first recess 158 of scroll element 150.And this radial direction
The setting of clearance C r is no longer influenced by determining scroll element 150 when providing axial elasticity and moves axially upwards
The impact of dynamic distance POP and restriction, this is because can be by regulating the height of the first boss
Eliminate impact and the restriction of distance POP, and the height of the first boss has no effect on and limit close
The thickness of envelope component.As such, it is possible to the thickness of containment member is set as the thinnest thus provides
More preferably sealing effectiveness, it addition, this sealing structure can also be arranged on and have distance POP relatively
In big screw compressor, so that it is guaranteed that the bigger screw compressor of distance POP can obtain more
Good sealing effectiveness.
In there is the manufacture of screw compressor of this sealing structure S100 and assembling process, need
Consider to manufacture as follows and assembly error: the center of the outer radial periphery identity distance dividing plate 116 of dividing plate 116
Distance, i.e. foozle Tor of the radius of dividing plate 1161r；Determine the center of scroll element 150
The distance at center, assembly error Tor the most therebetween relative to dividing plate 1162r；Determine vortex
The inner radial surface of the annular wall 157 of the first recess 158 of parts 150 is away from determining scroll element 150
The distance at center, foozle Tor of radius of inner radial surface of the i.e. first recess 1583r；
Distance between the outer radial periphery face of the outer radial periphery identity distance dividing plate 116 of the first boss 1161, i.e.
Foozle Tor in the outer radial periphery face of the first boss 11614r, as shown in Figure 5.
It is to say, have the manufacture of screw compressor and the assembling of this sealing structure S100
During, it is only necessary to consider by Tor1r～Tor4rComposition tolerance range, and be previously mentioned existing
Having in technology seal the manufacture of screw compressor of structure S and assembling process need consider by
Tor1～Tor6The tolerance range of composition.Visible, affect and limit the size ring of this radial clearance Cr
(tolerance ring) is relatively fewer, this thickness contributing to reducing containment member further, thus more preferably
Ground lift-off seal performance.It addition, this can also suitably reduce vortex while ensureing sealing property
The accuracy of manufacture of compressor and assembly precision, such that it is able to reduce the manufacturing cost of whole screw compressor
And reduce assembly difficulty.Additionally, in the screw compressor with this sealing structure S100,
Containment member is difficult to eject during compressor assembles such that it is able to be effectively prevented sealing structure
Part ejects during assembling.
Preferably, sealing structure S100 of screw compressor can also include the second containment member S130,
This second containment member S130 can be the most such as inner seal ring S130, interior close
The first extension S131 of seal S130 is configured to against second on the lower surface of dividing plate 116 convex
The lower surface of platform 1162 is to realize sealing, and the second extension S132 of inner seal ring S130 is configured to
Against determine scroll element 150 annular wall 159, the most such as can be against annular wall
The circumferential inner surface of 159 is to realize sealing, thus by the second pressure span in screw compressor and the
Three pressure spans separate, and in this embodiment, the 3rd pressure span can be such as but be not limited to height
Pressure side region HA.Seal structure S100 and also include the second elastic component S140, the second elastic component
S140 is arranged in the second recess 152 determining scroll element 150, with by the second containment member S130
Remain held against on the second boss 1162.When determining scroll element 150 and being in non-offloaded state, second
Boss 1162 is kept pressed against the second containment member S130 and makes the second containment member S130 will not be by
Pressure extrusion in three pressure spans or ejection, when determining scroll element 150 and being in unloaded state, the
Two boss 1162 are kept pressed against the lower surface of the second containment member S130 and the second boss 1162 at least
It is in the second recess 152.
It addition, this second recess 152 can be above-mentioned air vent but it also may be different from above-mentioned row
The recess of QI KOU.
In the present embodiment, the above-mentioned layout sealing structure 200 is obtained in that equally and seals structure
The advantage that the above-mentioned advantage of 100 is identical, is therefore not detailed herein.
Furthermore it is possible to will seal structure 100 with of the prior art a kind of seal structure, such as before
Sealing structure S (sealing axial gap) described is used in combination, or, can will seal
Structure 200 with of the prior art a kind of seal structure, such as before describe sealing structure S be combined
Use, i.e. sealing structure 100 or sealing structure 200 are used for region, high-pressure side HA and middle pressure
Side region MA seals, and sealing structure S being used in combination is used for centering pressure side region MA
Seal with low-pressure side region LA, or, sealing structure 100 or sealing structure 200 are used for
Low-pressure side region LA and medium voltage side region MA is sealed, and the sealing structure that will be used in combination
S seals for centering pressure side region MA and region, high-pressure side HA.These are by present embodiment
It is obtained in that as the scheme being used in combination with prior art and is used alone sealing structure 100 or seals knot
The advantage that structure 200 is capable of.But, above-mentioned layout and the sealing structure of structure 200 will be sealed
The above-mentioned layout of 100 is used in combination and can obtain more excellent effect, i.e. can obtain high-pressure side simultaneously
Optimum sealing effectiveness between region HA, medium voltage side region MA and low-pressure side region LA three,
Reduce the manufacturing cost of compressor to a greater extent and make compressor more easily assemble.
When determining scroll element 150 and being in non-offloaded state, the lower surface of the first boss 1161 is in
In one recess 158 or substantially flush with the upper surface of the annular wall 157 of the first recess 158, second
The lower surface of boss 1261 be in the second recess 258 or with the annular wall 159 of the second recess 258
Upper surface substantially flush.
Alternatively, when determining scroll element 150 and being in non-offloaded state, the first boss 1161 times
End face higher than the upper surface of the annular wall 157 of the first recess 158 first seals in the axial direction
The substantially half of the thickness of component S110, the lower surface of the second boss 1261 is in the axial direction than
The thickness of the highest second containment member S130 in upper surface of the annular wall 159 of two recesses 258 big
Cause half.
The lower surface of the first boss 1161 and the lower surface of the second boss 1162 are substantially in same level
On face, as shown in Figure 4, but the lower surface of the first boss 1161 and the lower end of the second boss 1162
Face can also be on the horizontal plane of differing heights respectively.Or, the annular wall 157 of the first recess 158
Upper surface and the upper surface of annular wall 159 of the second recess 152 can also substantially be in same level
On face, as shown in Figure 4.Alternatively, the lower surface of the first boss 1161 and the second boss 1162
Lower surface be substantially in same level and the upper surface of annular wall 159 of the first recess 158
The most substantially it is in same level with the upper surface of the annular wall 159 of the second recess 152.
The upper surface of the annular wall 157 of the first recess 158 in the axial direction away from dividing plate 116 with
The distance of the lower surface that the upper surface of the annular wall 157 of one recess 158 is facing is designed such as when fixed
Scroll element 150 is determined scroll element 150 and is not contacted with dividing plate 116 when being in unloaded state.
The upper surface of the annular wall 159 of the second recess 152 in the axial direction away from dividing plate 116 with
The distance of the lower surface that the upper surface of the annular wall 159 of two recesses 152 is facing is designed such as when fixed
Scroll element 150 is determined scroll element 150 and is not contacted with dividing plate 116 when being in unloaded state.
By this layout, so that determine scroll portion when determining scroll element 150 and being in unloaded state
Part 150 does not collides with dividing plate 116 or interferes, thus protects the parts of screw compressor the most impaired
Bad.
It addition, the first extension S111 and the second extension S112 one of the first containment member S110
Formed and the first containment member S110 have a cross section of generally L-shaped, the first extension S111 and
Can be formed between second extension S112 more than 90 ° but be less than the angle of 180 °.Dividing plate 116
The outer radial periphery face of the first boss 1161 and the annular wall of the first recess 158 determining scroll element 150
The radial distance between the radially inner circumference face of 157 thickness less than or equal to the first containment member S110,
As schematically shown in the diagram.
It addition, the first extension S131 and the second extension S132 mono-of the second containment member S130
Body formation and the second containment member S130 have the cross section of generally L-shaped, the first extension S131
With second can be formed between extension S132 more than 90 ° but angle less than 180 °.Dividing plate 116
The outer radial periphery face of the second boss 1261 and the annular wall of the second recess 258 determining scroll element 150
The radial distance between the radially inner circumference face of 159 thickness less than or equal to the second containment member S130.
Additionally, the first elastic component S120 can be helical spring, helical spring S120 is close to first
Envelope component S110 provide axial compression load.Second elastic component S140 can also be helical spring,
Helical spring S140 provides axial compression load to the second containment member S130.But the first elastic structure
Part S120 and the second elastic component S140 is not limited to helical spring, as long as it can seal first
Component S110 or the second containment member S130 remains held against the first boss 1161 or the second boss
On 1261.
Screw compressor close of second embodiment of the present invention is described referring now to Fig. 7 and Fig. 8
Seal structure S200.Fig. 7 is the sealing structure of the screw compressor of second embodiment of the present invention
Partial sectional view, Fig. 8 is the enlarged partial sectional view of the sealing structure in Fig. 7.
The difference of the second embodiment and the first embodiment is the boss configuration of dividing plate and determines
The configuration of the recess of scroll element, thus in this second embodiment, will focus on and describe these differences
Place, and omit the description to these parts identical with parts in the first embodiment.
In sealing structure S200 of the screw compressor of the second embodiment, the first of dividing plate 216
The radially inner circumference face, such as of the outer radial periphery face of boss 2161 and the first recess 258 determining scroll element
Almost parallel, as shown in Figure 7 with the radially inner circumference face of the annular wall 257 of the first recess 258.
Preferably, the outer radial periphery face of the first boss 2161 is the most tapered, and first
The outer radial periphery face of boss 2161 forms the relative to the plane residing for the lower surface of the first boss 2161
One angle [alpha], the first angle [alpha] equals to or less than 90 °, as shown in Figure 8.When the first angle [alpha] is equal to
When 90 °, the first boss 2161 and the first recess 258 become the first boss in the first embodiment
1161 and first recess 158.
The outer radial periphery face of the first boss 2161 of dividing plate 216 and the first recess 258 determining scroll element
Radially inner circumference face, such as and the first recess 258 annular wall 257 radially inner circumference face between footpath
To the distance thickness less than or equal to the first containment member S110.
Similarly, the outer radial periphery of the second boss 2161 of sealing structure S200 of screw compressor
The radially inner circumference face of face and the second recess 252 determining scroll element, such as with the ring of the second recess 252
The radially inner circumference face of shape wall 259 is almost parallel, as shown in Figure 7.
Preferably, the outer radial periphery face of the second boss 2162 is the most tapered, and second
The outer radial periphery face of boss 2162 forms the relative to the plane residing for the lower surface of the second boss 2162
Two angles, the second angle equals to or less than 90 °, as shown in Figure 7.When the second angle is equal to 90 °,
Second boss 2162 and the second recess 252 become the second boss 1162 in the first embodiment and
Two recesses 152.
The outer radial periphery face of the second boss 2162 of dividing plate 216 and the second recess 252 determining scroll element
Radially inner circumference face, such as and the first recess 252 annular wall 259 radially inner circumference face between footpath
To the distance thickness less than or equal to the second containment member S130.
This layout by the sealing structure of the screw compressor of present embodiment so that need by close
Envelope component carries out the gap that seals and is converted to radial clearance by the axial gap of prior art, and this footpath
To the setting in gap be no longer influenced by when providing axial elasticity determining scroll element moves axially upwards away from
Impact and restriction from POP.As such, it is possible to the thickness of containment member is set as the thinnest
Thus provide more preferably sealing effectiveness, it addition, this sealing structure can also be arranged on and have distance
In the screw compressor that POP is bigger, so that it is guaranteed that the bigger screw compressor of distance POP is permissible
Obtain more preferably sealing effectiveness.
It addition, the manufacture of the screw compressor of this sealing structure in there is present embodiment and
In assembling process, affect and to limit the size ring (tolerance ring) of this radial clearance relatively fewer,
This thickness contributing to reducing containment member further, thus preferably lift-off seal performance.Additionally,
This can also suitably reduce the accuracy of manufacture and the group of screw compressor while ensureing sealing property
Dress precision, such that it is able to reduce the manufacturing cost of whole screw compressor and reduce assembly difficulty.
Additionally, in the screw compressor with this sealing structure, containment member assembles at compressor
During be difficult to eject such that it is able to be effectively prevented containment member assembling during eject.
Although describe the numerous embodiments of the present invention above with reference to Fig. 1-8, but art technology
Personnel are it should be understood that further modification and/or improvement can be made to some aspects of the present invention.
Such as, the lower surface of described dividing plate is additionally provided with the second boss, and, described vortex
Compressor also includes: the second containment member, and the first extension of described second containment member is configured to
Lower surface and the second of described second containment member against described second boss of described dividing plate
Extension be configured to against described the second recess determining scroll element annular wall with realize seal, from
And described second pressure span and the 3rd pressure span in described housing are separated, wherein said
Pressure in three pressure spans is different from described first pressure span and described second pressure span
Pressure；And second elastic component, described second elastic component is arranged in described second recess,
To remain held against on described second boss by described second containment member, wherein, determine whirlpool when described
When rotation parts are in described non-offloaded state, described second boss is kept pressed against described second and seals structure
Part makes described second containment member will not be by described second pressure span and described 3rd pressure area
Pressure extrusion in the pressure span that in territory, pressure is bigger or ejection, determine scroll element when described
When being in described unloaded state, described second boss is kept pressed against described second containment member and institute
The described lower surface stating the second boss is at least in described second recess.
Such as, described first boss and described second boss are positioned at the radially inner side of another one with one
Mode is arranged, or, described first containment member and described second containment member are positioned at another with one
The mode of the radially inner side of person is arranged.
Such as, when described determine scroll element be in described non-offloaded state time, the institute of described first boss
State lower surface and be in the upper end of the described annular wall in described first recess or with described first recess
Face is substantially flush.
Such as, when described determine scroll element be in described non-offloaded state time, the institute of described first boss
State lower surface institute higher than the upper surface of the described annular wall of described first recess in the axial direction
State the substantially half of the thickness of the first containment member.
Such as, the described lower surface of the described lower surface of described second boss and described first boss is substantially
It is in same level and/or the upper surface of described annular wall of described second recess and described
The upper surface of the described annular wall of the first recess is substantially in same level.
Such as, the footpath of the described annular wall of the outer radial periphery face of described first boss and described first recess
Almost parallel to inner peripheral surface.
Such as, the described outer radial periphery face of described first boss is the most tapered, and institute
State the described outer radial periphery face of the first boss relative to residing for the described lower surface of described first boss
Plane forms the first angle, and described first angle equals to or less than 90 °.
Such as, between outer radial periphery face and the radially inner circumference face of described first recess of described first boss
Radial distance less than or equal to the thickness of described first containment member.
Such as, to be roughly parallel to the footpath of described first boss outside in the outer radial periphery face of described second boss
Side face, and, the radially inner circumference face of the described annular wall of described second recess is roughly parallel to described
The radially inner circumference face of the described annular wall of one recess.
Such as, between outer radial periphery face and the radially inner circumference face of described second recess of described second boss
Radial distance less than or equal to the thickness of described second containment member.
Such as, the upper surface of the described annular wall of described first recess is in the axial direction away from described dividing plate
The distance of the facing lower surface in the described upper surface with the described annular wall of described first recess set
It is calculated as so that determining described when scroll element is in described unloaded state to determine scroll element with described when described
Dividing plate does not contacts.
Such as, the upper surface of the described annular wall of described second recess is in the axial direction away from described dividing plate
The distance of the facing lower surface in the described upper surface with the described annular wall of described second recess set
It is calculated as so that determining described when scroll element is in described unloaded state to determine scroll element with described when described
Dividing plate does not contacts.
Such as, described first extension of described first containment member and described second extension one bodily form
Become and described first containment member has the cross section of generally L-shaped and/or described second sealing
Described first extension of component and described second extension are integrally formed and described second sealing structure
Part has the cross section of generally L-shaped.
Such as, described first pressure span is corresponding to the low-pressure side region connected with admission pressure and institute
State the second pressure span corresponding to and described dynamic scroll element and described determine between scroll element formation
The medium voltage side region of a compression chamber connection in a series of compression chambers, or, described first pressure area
Territory corresponding to the region, high-pressure side that connect with pressure at expulsion and described second pressure span correspond to
A pressure in described dynamic scroll element and the described a series of compression chambers determining to be formed between scroll element
The medium voltage side region of contracting chamber connection.
Although having described the various embodiments of the present invention in detail at this, it should be appreciated that the present invention is also
Be not limited to the detailed description of the invention describing in detail here and illustrating, without departing from the present invention essence and
Other modification and variant is may be effected by one skilled in the art in the case of scope.All these changes
Type and variant are within the scope of the present invention.And, all components described here can be by it
He replaces by the component of technical upper equivalent.
Claims (15)
1. a screw compressor (100), including:
Housing (110)；
The compression mechanism (150,160) being arranged in described housing (110), described compression mechanism (150,
160) be suitable to compression work fluid and include determining scroll element (150) and dynamic scroll element (160)；
Dividing plate (116；216), described dividing plate (116；216) it is arranged in described housing (110)
And determine scroll element (150), at described dividing plate (116 adjacent to described；216) set on lower surface
It is equipped with the first boss (1161；2161)；
First containment member (S110), the first extension of described first containment member (S110)
(S111) it is configured to against described dividing plate (116；216) described first boss (1161；2161)
Lower surface and second extension (S112) of described first containment member (S110) be configured to
Against described the first recess (158 determining scroll element (150)；258) annular wall (157；257)
With realize seal, thus by first pressure span with different pressures in described housing (110) with
Second pressure span separates；And
First elastic component (S120), described first elastic component (S120) is arranged on described first
Recess (158；258) in, described first containment member (S110) to be remained held against described
One boss (1161；2161) on,
Wherein, described determine scroll element (150) and can change between non-offloaded state and unloaded state,
When described determine scroll element (150) be in described non-offloaded state time, described first boss (1161；
2161) it is kept pressed against described first containment member (S110) and makes described first containment member (S110)
Will not be by the bigger pressure area of pressure in described first pressure span and described second pressure span
In territory pressure extrusion or eject, when described determine scroll element (150) be in described unloaded state time,
Described first boss (1161；2161) it is kept pressed against described first containment member (S110) and institute
State the first boss (1161；2161) described lower surface is at least in described first recess (158；258)
In.
Screw compressor the most according to claim 1 (100), wherein, at described dividing plate (116；
216) the second boss (1162 it is additionally provided with on lower surface；2162), and, described scroll compression
Machine (100) also includes:
Second containment member (S130), the first extension of described second containment member (S130)
(S131) it is configured to against described dividing plate (116；216) described second boss (1162；2162)
Lower surface and second extension (S132) of described second containment member (S130) be configured to
Against described the second recess (152 determining scroll element (150)；252) annular wall (159；259)
To realize sealing, thus by described second pressure span and the 3rd pressure area in described housing (110)
Territory separates, and the pressure in wherein said 3rd pressure span is different from described first pressure span and described
Pressure in second pressure span；And
Second elastic component (S140), described second elastic component (S140) is arranged on described second
Recess (152；252) in, described second containment member (S130) to be remained held against described
Two boss (1162；2162) on,
Wherein, when described determine scroll element (150) be in described non-offloaded state time, described second convex
Platform (1162；2162) being kept pressed against described second containment member (S130) makes described second to seal
Component (S130) will not be bigger by pressure in described second pressure span and described 3rd pressure span
A pressure span in pressure extrusion or eject, determine described in scroll element (150) is in when described
During unloaded state, described second boss (1162；2162) it is kept pressed against described second containment member
And described second boss (1162 (S130)；2162) described lower surface is at least in described
Two recesses (152；252) in.
Screw compressor the most according to claim 2 (100), wherein, described first boss
(1161；2161) and described second boss (1162；2162) radial direction of another one it is positioned at one
The mode of inner side is arranged, or, described first containment member (S110) and described second containment member
(S130) arrange be positioned at the radially inner side of another one by one in the way of.
Screw compressor the most according to claim 1 (100), wherein, determines scroll portion when described
When part (150) is in described non-offloaded state, described first boss (1161；2161) under described
End is at described first recess (158；258) in or with described first recess (158；258)
Described annular wall (157；257) upper surface is substantially flush.
Screw compressor the most according to claim 1 (100), wherein, determines scroll portion when described
When part (150) is in described non-offloaded state, described first boss (1161；2161) under described
End face is in the axial direction than described first recess (158；258) described annular wall (157；257)
The substantially half of thickness of the highest described first containment member (S110) in upper surface.
Screw compressor the most according to claim 2 (100), wherein, described second boss
(1162；2162) described lower surface and described first boss (1161；2161) described lower end
Face is substantially in same level and/or described second recess (152；252) described annular
Wall (159；259) upper surface and described first recess (158；258) described annular wall (157；
257) upper surface is substantially in same level.
Screw compressor the most according to claim 1 (100), wherein, described first boss
(1161；2161) outer radial periphery face and described first recess (158；258) described annular wall
(157；257) radially inner circumference face is almost parallel.
Screw compressor the most according to claim 7 (100), wherein, described first boss
(1161；2161) described outer radial periphery face is the most tapered, and described first convex
Platform (1161；2161) described outer radial periphery face is relative to described first boss (1161；2161)
The plane residing for described lower surface form the first angle (α), described first angle (α) is equal to
Or less than 90 °.
9. according to the screw compressor (100) described in any one in claim 1 to 8, wherein,
Described first boss (1161；2161) outer radial periphery face and described first recess (158；258)
Radially inner circumference face between radial distance less than or equal to the thickness of described first containment member (S110)
Degree.
10. according to the screw compressor (100) described in any one in claim 2 to 8, wherein,
Described second boss (1162；2162) outer radial periphery face is roughly parallel to described first boss (1161；
2161) outer radial periphery face, and, described second recess (152；252) described annular wall (159；
259) radially inner circumference face is roughly parallel to described first recess (158；258) described annular wall (157；
257) radially inner circumference face.
11. according to the screw compressor (100) described in any one in claim 2 to 8, wherein,
Described second boss (1162；2162) outer radial periphery face and described second recess (152；252)
Radially inner circumference face between radial distance less than or equal to the thickness of described second containment member (S130)
Degree.
12. according to the screw compressor (100) described in any one in claim 1 to 8, wherein,
Described first recess (158；258) described annular wall (157；257) upper surface is in axially side
Upwards away from described dividing plate (116；216) with described first recess (158；258) described annular
Wall (157；257) distance of the lower surface that described upper surface is facing is designed such as when described fixed
Scroll element (150) is described when being in described unloaded state determines scroll element (150) and described dividing plate
(116；216) do not contact.
13. according to the screw compressor (100) described in any one in claim 2 to 8, wherein,
Described second recess (152；252) described annular wall (159；259) upper surface is in axially side
Upwards away from described dividing plate (116；216) with described second recess (152；252) described annular
Wall (159；259) distance of the lower surface that described upper surface is facing is designed such as when described fixed
Scroll element (150) is described when being in described unloaded state determines scroll element (150) and described dividing plate
(116；216) do not contact.
14. according to the screw compressor (100) described in any one in claim 2 to 8, wherein,
Described first extension (S111) of described first containment member (S110) and described second extension
(S112) it is integrally formed and described first containment member (S110) has the cross section of generally L-shaped
And/or described first extension (S131) of described second containment member (S130) and described
Two extensions (S132) are integrally formed and described second containment member (S130) has generally L-shaped
Cross section.
15. according to the screw compressor (100) described in any one in claim 1 to 8, wherein,
Described first pressure span is corresponding to the low-pressure side region connected with admission pressure and described second pressure
Power region corresponding to and described dynamic scroll element (140) and described determine shape between scroll element (150)
The medium voltage side region of a compression chamber connection in a series of compression chambers become, or, described first pressure
Power region is corresponding corresponding to the region, high-pressure side and described second pressure span with pressure at expulsion connection
In described dynamic scroll element (140) and described determine between scroll element (150) formed a series of
The medium voltage side region of a compression chamber connection in compression chamber.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510055931.6A CN105986996B (en) | 2015-02-03 | 2015-02-03 | Scroll compressor having a plurality of scroll members |
| PCT/CN2016/073067 WO2016124120A1 (en) | 2015-02-03 | 2016-02-01 | Scroll compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510055931.6A CN105986996B (en) | 2015-02-03 | 2015-02-03 | Scroll compressor having a plurality of scroll members |
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| Publication Number | Publication Date |
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| CN105986996A true CN105986996A (en) | 2016-10-05 |
| CN105986996B CN105986996B (en) | 2018-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN103291614A (en) * | 2012-02-29 | 2013-09-11 | 艾默生环境优化技术(苏州)有限公司 | Scroll compressor having a plurality of scroll members |
| JP2014231833A (en) * | 2013-04-30 | 2014-12-11 | パナソニックＩｐマネジメント株式会社 | Scroll compressor |
| CN204610280U (en) * | 2015-02-03 | 2015-09-02 | 艾默生环境优化技术(苏州)有限公司 | Scroll compressor having a plurality of scroll members |
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2015
- 2015-02-03 CN CN201510055931.6A patent/CN105986996B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103932A (en) * | 1993-08-30 | 1995-06-21 | 三菱重工株式会社 | Scroll-type fluid machine |
| CN1215802A (en) * | 1997-10-25 | 1999-05-05 | 三星电子株式会社 | Scroll type compressor with two-piece top plate of improved structure |
| JPH11182458A (en) * | 1997-12-17 | 1999-07-06 | Sanyo Electric Co Ltd | Scroll type compressor |
| JP2001032784A (en) * | 1999-07-19 | 2001-02-06 | Fujitsu General Ltd | Scroll compressor |
| CN1828022A (en) * | 2005-03-04 | 2006-09-06 | 科普兰公司 | Scroll machine with single plate floating seal |
| CN101849108A (en) * | 2007-09-11 | 2010-09-29 | 艾默生环境优化技术有限公司 | Compressor sealing arrangement |
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| Publication number | Publication date |
|---|---|
| CN105986996B (en) | 2018-10-09 |
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