CN207333183U - Screw compressor - Google Patents
Screw compressor Download PDFInfo
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- CN207333183U CN207333183U CN201721165201.2U CN201721165201U CN207333183U CN 207333183 U CN207333183 U CN 207333183U CN 201721165201 U CN201721165201 U CN 201721165201U CN 207333183 U CN207333183 U CN 207333183U
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- 239000007789 gas Substances 0.000 description 45
- 238000007906 compression Methods 0.000 description 20
- 230000006835 compression Effects 0.000 description 18
- 238000003754 machining Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000003434 inspiratory effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
It the utility model is related to a kind of screw compressor, including fixed scroll and movable orbiting scroll, fixed scroll and movable orbiting scroll are combined together, the scroll wrap molded line of fixed scroll includes the first center head section and the first center inner circle segmental arc, and the scroll wrap molded line of movable orbiting scroll includes the second center head section and the second center inner circle segmental arc；In the second center head section during being rotated the state for departing from the first center inner circle segmental arc turns to the second center head section along the first center inner circle segmental arc, the scroll wrap of fixed scroll between middle pressure chamber and suction muffler and the scroll wrap of movable orbiting scroll form gap, the scroll wrap of the fixed scroll between discharge chamber and middle pressure chamber and the scroll wrap engagement of movable orbiting scroll；During the second center head section is rotated along the first center inner circle segmental arc, gap is formed between first center head section and the second center inner circle segmental arc, gap is formed between second center head section and the first center inner circle segmental arc, the scroll wrap of the fixed scroll between suction muffler and middle pressure chamber and the scroll wrap engagement of movable orbiting scroll.
Description
Technical field
Refrigeration technology field is the utility model is related to, more particularly to a kind of screw compressor.
Background technology
Screw compressor, since its simple in structure, small, light-weight, low power consumption and other advantages is widely used in refrigeration
In air-conditioning system.Screw compressor includes fixed scroll, movable orbiting scroll, and the scroll wrap molded line of fixed scroll and movable orbiting scroll is a pair of of conjugation
Round involute.Fixed scroll is identical with the scroll wrap molded line parameter of movable orbiting scroll, phase difference is 180 °, the scroll wrap of fixed scroll and dynamic
The scroll wrap face of whirlpool disk and it is combined together, the basic circle center of the scroll wrap of fixed scroll and the scroll wrap of movable orbiting scroll is at a distance of specific
Distance R, the scroll wrap outside line of fixed scroll and the scroll wrap interior lines of movable orbiting scroll are there are meshing point, and the scroll wrap interior lines of fixed scroll are with moving
The scroll wrap outside line of whirlpool disk is there are meshing point, therefore, by afterbody to center successively shape between fixed scroll and the scroll wrap of movable orbiting scroll
Into suction muffler, middle pressure chamber and discharge chamber.Movable orbiting scroll is driven by rotating mechanism and does the circumference fortune that radius is R around fixed scroll basic circle center
It is dynamic.Movable orbiting scroll rotates a circle, and screw compressor can complete an air-breathing, once be vented, in the rotary course of movable orbiting scroll, in
The volume of pressure chamber tapers into the compression for realizing gas.Air-breathing, compression, the exhaust process of screw compressor be while and continuous
Carry out.
But in traditional screw compressor, the fit precision of movable orbiting scroll and fixed scroll is more demanding, that is, requires movable orbiting scroll
Between the scroll wrap of fixed scroll multipair compression chamber is required to center all the time there are meshing point from the afterbody of scroll wrap molded line
Multigroup symmetrical meshing point engages at the same time all the time.And among actual production, the profile of the scroll wrap of movable orbiting scroll and fixed scroll is easily deposited
In machining deviation, protruding point is formed on scroll wrap wall, fixed scroll and movable orbiting scroll can be caused to interfere and grind at protruding point
Damage, and can not be engaged at meshing point, cause gas blowby easily occurs between suction muffler, middle pressure chamber and discharge chamber, so as to cause whirlpool
It is bad to revolve compressor performance.
Utility model content
Based on this, it is necessary to for traditional screw compressor performance it is bad the problem of, there is provided a kind of screw compressor.
A kind of screw compressor, including fixed scroll and movable orbiting scroll, the fixed scroll and the movable orbiting scroll are combined together, institute
State the relatively described fixed scroll revolution of movable orbiting scroll.The scroll wrap of the scroll wrap of the movable orbiting scroll and the fixed scroll is from afterbody to head
Direction cooperatively forms suction muffler, middle pressure chamber and discharge chamber.The scroll wrap molded line of the fixed scroll include the first center head section and
First center inner circle segmental arc, the scroll wrap molded line of the movable orbiting scroll include the second center head section and the second center inner circle segmental arc.
Turned in the second center head section from the state for departing from the first center inner circle segmental arc in described second
Mind section starts during being rotated along the first center inner circle segmental arc, the institute between medium pressure chamber and the suction muffler
State the scroll wrap of fixed scroll and the scroll wrap of the movable orbiting scroll forms gap, it is described between the discharge chamber and medium pressure chamber
The scroll wrap of fixed scroll and the engagement of the scroll wrap of the movable orbiting scroll.
During the second center head section is rotated along the first center inner circle segmental arc, first center head
Gap, the second center head section and first center Inner arc are formed between section and the second center inner circle segmental arc
Gap is formed between section, the scroll wrap of the fixed scroll between the suction muffler and medium pressure chamber and the whirlpool of the movable orbiting scroll
Revolve tooth engagement.
Above-mentioned screw compressor, the second center head section are rotated from the state for departing from the first center inner circle segmental arc
Start to the second center head section during being rotated along the first center inner circle segmental arc, suction muffler, which is opened, to be inhaled
Gas, medium pressure chamber start primary compression gas, and the discharge chamber starts to be vented.Due to medium pressure chamber and the suction muffler it
Between the scroll wrap of the fixed scroll and the scroll wrap of the movable orbiting scroll form gap, on the one hand, so that movable orbiting scroll is when rotated,
Movable orbiting scroll is use up by main shaft drives, the direction on movable orbiting scroll towards the head of scroll wrap of the head of the scroll wrap of movable orbiting scroll away from fixed scroll
Amount is close to fixed scroll, it is ensured that the scroll wrap of the fixed scroll between the discharge chamber and medium pressure chamber and the dynamic whirlpool
The scroll wrap of disk fully engages.Meanwhile the scroll wrap of the fixed scroll between middle pressure chamber and the suction muffler and the dynamic whirlpool
The scroll wrap of disk will not interfere.On the other hand, add even if the scroll wrap of fixed scroll and the scroll wrap of the movable orbiting scroll exist
Work error, such as the scroll wrap wall thickness increase of fixed scroll or scroll wrap wall thickness increase (the i.e. scroll wrap wall of fixed scroll of movable orbiting scroll
Or there are protruding point on the scroll wrap wall of movable orbiting scroll), due to the vortex of the fixed scroll between middle pressure chamber and the suction muffler
The scroll wrap of tooth and the movable orbiting scroll forms gap, and movable orbiting scroll can step down when rotating, and avoid above-mentioned protruding point, then move whirlpool
Disk continue recover rotary motion trace, without movable orbiting scroll scroll wrap and fixed scroll vortex interference of tooth situation, so may be used
To reduce the machining accuracy of the scroll wrap of the scroll wrap of fixed scroll and movable orbiting scroll so that handling ease.In addition, because of middle pressure at this time
Intracavity gas pressure and gas pressure pressure difference in suction muffler are smaller, even if the scroll wrap of the fixed scroll between middle pressure chamber and suction muffler
Form gap with the scroll wrap of movable orbiting scroll, the leakage of gas in middle pressure chamber will not be caused, the gas being both inhaled into can all into
Enter compression process, can still ensure inspiratory capacity close to theoretical value.In screw compressor real-world operation, screw compressor is place
In continuous air-breathing, compression and the work of exhaust.When middle pressure chamber starts primary compression gas, the discharge chamber is also at constantly
Compression and the stage of exhaust, at this time, because the scroll wrap of fixed scroll and the scroll wrap of movable orbiting scroll between discharge chamber and middle pressure chamber
Engagement, i.e. middle pressure chamber and discharge chamber is completely isolated, and the gases at high pressure in discharge chamber can not drive in the wrong direction into middle pressure chamber, so that
Gases at high pressure in discharge chamber are all discharged No leakage, so as to ensure capacity close to theoretical value.
During the second center head section is rotated along the first center inner circle segmental arc, the suction muffler is gradual
Close, one time air-breathing terminates, and medium pressure chamber starts to strengthen compressed gas, and gradually exhaust terminates discharge chamber.In the process, by
Gap, the second center head section and institute are formed between the first center head section and the second center inner circle segmental arc
State and form gap between the first center inner circle segmental arc, on the one hand, so that movable orbiting scroll is by main shaft drives when being rotated, movable orbiting scroll is towards dynamic
The head of the scroll wrap of whirlpool disk is close to the direction on the head of the scroll wrap of fixed scroll close proximity to fixed scroll, it is ensured that the suction
The scroll wrap of the fixed scroll between air cavity and medium pressure chamber and the scroll wrap of the movable orbiting scroll fully engage.Meanwhile the
Will not be interfered between one center head section and the second center inner circle segmental arc, the second center head section with it is described
It will not be interfered between first center inner circle segmental arc.On the other hand, even if the scroll wrap of fixed scroll and the movable orbiting scroll
There are mismachining tolerance, such as the scroll wrap wall thickness increase of fixed scroll or scroll wrap wall thickness increase (the i.e. quiet whirlpool of movable orbiting scroll for scroll wrap
There are protruding point on the scroll wrap wall of disk or movable orbiting scroll), due to the first center head section and the second center inner circle segmental arc it
Between there are gap, there are gap, movable orbiting scroll between the second center head section and the first center inner circle segmental arc to rotate
When can step down, avoid above-mentioned protruding point, then movable orbiting scroll continue recover rotary motion trace, without the scroll wrap of movable orbiting scroll
With the situation of the vortex interference of tooth of fixed scroll, the processing that can so reduce the scroll wrap of fixed scroll and the scroll wrap of movable orbiting scroll is smart
Degree so that handling ease.In addition, the reinforcing compression stage of gas is come into because of middle pressure chamber at this time, gas pressure in middle pressure chamber
Power is very high, but isolates between middle pressure chamber and suction muffler, and the gas in middle pressure chamber can not be leaked out by suction muffler, effectively protects
The gas being inhaled into is demonstrate,proved to be compressed completely.As gas is gradually pushed into discharge chamber, gas is still in middle pressure chamber and discharge chamber
Continued compression, and prepare to discharge.And there are gap between the first center head section and the second center inner circle segmental arc, described
There are gap between two center head sections and the first center inner circle segmental arc, even if gas is micro in discharge chamber leaks to middle pressure
Chamber, can also be discharged by being again pushed into discharge chamber, will not cause the leakage of gas in middle pressure chamber, the gas being both inhaled into can be whole
Compressed and be discharged.
Therefore, when screw compressor operates, it can ensure that the gas of all suctions is all compressed and is all discharged,
It ensure that the design discharge capacity of screw compressor so that the compression effectiveness of screw compressor is preferable.Simultaneously because fixed scroll and dynamic whirlpool
Effective gap is devised between the scroll wrap of disk so that movable orbiting scroll can step down when rotated, caused by avoiding machining deviation
Protruding point on the scroll wrap wall of fixed scroll or movable orbiting scroll, so as to avoid caused by machining deviation the scroll wrap of fixed scroll and
Interference and abrasion between the scroll wrap of movable orbiting scroll, avoid the problem of power consumption caused by interfering and wearing is higher, extend
The service life of screw compressor.Further, since effective gap is devised between fixed scroll and the scroll wrap of movable orbiting scroll, moreover it is possible to
Enough reduce fixed scroll and the machining accuracy of movable orbiting scroll so that handling ease.
In one of the embodiments, the scroll wrap molded line of the fixed scroll further includes line segment and the first outside line in first
Section, line segment and the first outer line segment head away from the fixed scroll in described first；The vortex flute profile of the movable orbiting scroll
Line further includes line segment and the second outer line segment in second, and line segment and the second outer line segment are away from the movable orbiting scroll in described second
Head, and during the relatively described fixed scroll of the movable orbiting scroll is rotating, line segment and first outside line in described second
Section is engaged, and the second outer line segment is engaged with line segment in described first；In the second center head section from described in disengaging
The state of first center inner circle segmental arc turns to the second center head section and starts to rotate along the first center inner circle segmental arc
During, form gap in described first between line segment and the second outer line segment, line segment and described first in described second
Gap is formed between outer line segment.
In one of the embodiments, the gap between the first center head section and the second center inner circle segmental arc
Size is in the range of 0.01 to 0.2mm, the gap between the second center head section and the first center inner circle segmental arc
Size is in the range of 0.01 to 0.2mm.
In one of the embodiments, the gap size in described first between line segment and the second outer line segment is 0.01
To in the range of 0.2mm, the gap size in described second between line segment and the first outer line segment is in 0.01 model for arriving 0.2mm
In enclosing.
In one of the embodiments, the fixed scroll and the scroll wrap of the movable orbiting scroll are cross-section scroll wrap；Institute
State gap size between the first center head section and the second center inner circle segmental arc, the second center head section with it is described
Gap size between first center inner circle segmental arc, the gap size in described first between line segment and the second outer line segment and
Gap size in described second between line segment and the described first outer line segment is equal.
In one of the embodiments, the first center head section, the first center inner circle segmental arc, in described first
Line segment, the first outer line segment are same circle involute, the second center head section, second center Inner arc
Section, line segment, the second outer line segment are same circle involute in described second.
In one of the embodiments, the fixed scroll and the scroll wrap of the movable orbiting scroll are variable cross-section scroll wrap；Institute
It is the first preset value to state the gap size between the first center head section and the second center inner circle segmental arc；Second center
Gap size between head sections and the first center inner circle segmental arc is the second preset value；Line segment and described the in described first
Direction of the gap size from the head of the fixed scroll to afterbody between two outer line segments is gradually reduced；In described second line segment with
Direction of the gap size from the head of the fixed scroll to afterbody between the first outer line segment is gradually reduced.
In one of the embodiments, the first center head section, the first center inner circle segmental arc, in described first
Line segment and the first outer line segment are respectively the circle involute of different radii, in the second center head section, described second
Intracardiac arc section, line segment and the second outer line segment are respectively the circle involute of different radii in described second.
Brief description of the drawings
Quiet whirlpool when Fig. 1 is the second center head section the first center inner circle segmental arc of disengaging of the screw compressor of an embodiment
The cooperation schematic diagram of disk and movable orbiting scroll；
Fig. 2 be Fig. 1 shown in screw compressor the second center head section start along the first center inner circle segmental arc move when
Fixed scroll and movable orbiting scroll cooperation schematic diagram；
Fig. 3 is when the second central head section of the screw compressor shown in Fig. 1 is located at the first center Inner arc intersegmental part
Fixed scroll and movable orbiting scroll cooperation schematic diagram；
Fig. 4 be Fig. 1 shown in screw compressor the second center head section start depart from the first center inner circle segmental arc when
The cooperation schematic diagram of fixed scroll and movable orbiting scroll；
Fig. 5 is the schematic diagram for the state for returning to fixed scroll and movable orbiting scroll shown in Fig. 1.
Embodiment
To enable the above-mentioned purpose of the utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this
The embodiment of utility model is described in detail.
Fig. 1 to Fig. 5 is refer to, Fig. 1 is that the second center head section of the screw compressor of the present embodiment departs from the first center
The cooperation schematic diagram of fixed scroll and movable orbiting scroll during inner circle segmental arc；Fig. 2 is the second central head of the screw compressor shown in Fig. 1
Section start along the first center inner circle segmental arc move when fixed scroll and movable orbiting scroll cooperation schematic diagram；Fig. 3 is the whirlpool shown in Fig. 1
The cooperation of fixed scroll and movable orbiting scroll when second central head section of rotation compressor is located at the first center Inner arc intersegmental part is shown
It is intended to；Fig. 4 is quiet whirlpool when the second center head section of the screw compressor shown in Fig. 1 starts to depart from the first center inner circle segmental arc
The cooperation schematic diagram of disk and movable orbiting scroll；Fig. 5 is the schematic diagram for the state for returning to fixed scroll and movable orbiting scroll shown in Fig. 1.
As shown in Figures 1 to 5, a kind of screw compressor 200, including fixed scroll 210 and movable orbiting scroll 230,210 He of fixed scroll
The scroll wrap molded line parameter of movable orbiting scroll 230 is identical, phase difference is 180 °.Fixed scroll 210 and movable orbiting scroll 230 are combined together, and are moved
Whirlpool disk 230 revolves round the sun with respect to fixed scroll 210, and the scroll wrap of movable orbiting scroll 230 and the scroll wrap of fixed scroll 210 are from afterbody to cephalad direction
Cooperatively form suction muffler 250, middle pressure chamber 270 and discharge chamber 290；The scroll wrap molded line of fixed scroll 210 includes the first central head
Section AB and the first center inner circle segmental arc BC；The scroll wrap molded line of movable orbiting scroll 230 is included in the second center head section A ' B ' and second
Intracardiac arc section B ' C '.
Basic circle center of circle Periodic Rotating of the movable orbiting scroll 230 around fixed scroll 210.In 230 rotating a cycle of movable orbiting scroll,
As Fig. 1 to Fig. 2, the second center head section A ' B ' turn to the second central head from the state for departing from the first center inner circle segmental arc BC
Section A ' B ' start the position rotated along the first center inner circle segmental arc BC.Such as Fig. 2 to Fig. 3, movable orbiting scroll 230 is further continued for along the first center
Inner circle segmental arc BC is rotated.Such as Fig. 3 to Fig. 4, movable orbiting scroll 230 turns to the second center head section A ' B ' and starts to depart from the first center
Arc section BC.Such as Fig. 4 to Fig. 5, movable orbiting scroll 230 is rotated further, and the second center head section A ' B ' are departed from the first center
Arc section BC, returns to the position shown in Fig. 1.In this way, movable orbiting scroll 230 completes the rotation in a cycle, this process is also whirlpool
Revolve 200 continuous air-breathing of compressor, compression and a cycle of exhaust.
It should be noted that it is relative motion between movable orbiting scroll 230 and fixed scroll 210.That is, the second central head
Section A ' B ' are since the state for departing from the first center inner circle segmental arc BC turns to the second center head section A ' B ' along the first center
During the position that arc section BC is rotated, the first center head section AB is also from the state for departing from the second center inner circle segmental arc B ' C '
Turn to the position that the first center head section AB starts to rotate along the second center inner circle segmental arc B ' C '.In the second center head section A '
B ' along the first center inner circle segmental arc BC rotate while, the first center head section AB is also correspondingly along the second center inner circle segmental arc B '
C ' is rotated.
As shown in Figure 1 to Figure 2, the second center head section A ' B ' are turned to from the state for departing from the first center inner circle segmental arc BC
Second center head section A ' B ' start during being rotated along the first center inner circle segmental arc BC, middle pressure chamber 270 and suction muffler 250 it
Between fixed scroll 210 scroll wrap and movable orbiting scroll 230 scroll wrap formed gap (including gap 1 and gap 2), discharge chamber 290
The scroll wrap of fixed scroll 210 between middle pressure chamber 270 and the scroll wrap engagement of movable orbiting scroll 230.
Second center head section A ' B ' turn to the second center head section from the state for departing from the first center inner circle segmental arc BC
A ' B ' start during being rotated along the first center inner circle segmental arc BC, and suction muffler 250, which is opened, carries out air-breathing, and middle pressure chamber 270 starts
Primary compression gas, discharge chamber 290 start to be vented.Due to the vortex of the fixed scroll 210 between middle pressure chamber 270 and suction muffler 250
The scroll wrap of tooth and movable orbiting scroll 230 forms gap (gap 1 and gap 2), on the one hand, so that movable orbiting scroll 230 is when rotated, moves whirlpool
Disk 230 is by main shaft drives, and movable orbiting scroll 230 is towards the head of scroll wrap of the head of the scroll wrap of movable orbiting scroll 230 away from fixed scroll 210
Direction close proximity to fixed scroll 210, it is ensured that the scroll wrap of the fixed scroll 210 between discharge chamber 290 and middle pressure chamber 270 and
The scroll wrap of movable orbiting scroll 230 fully engages.Meanwhile the scroll wrap of the fixed scroll 210 between middle pressure chamber 270 and suction muffler 250 and
The scroll wrap of movable orbiting scroll 230 will not interfere.On the other hand, even if the vortex of the scroll wrap of fixed scroll 210 and movable orbiting scroll 230
Tooth there are mismachining tolerance, such as the scroll wrap wall thickness increase of fixed scroll 210 or the scroll wrap wall thickness increase of movable orbiting scroll 230 it is (i.e. quiet
There are protruding point on the scroll wrap wall of whirlpool disk 210 or the scroll wrap wall of movable orbiting scroll 230), due to middle pressure chamber 270 and suction muffler 250
Between fixed scroll 210 scroll wrap and movable orbiting scroll 230 scroll wrap formed gap (gap 1 and gap 2), movable orbiting scroll 230 exists
It can step down during rotation, avoid above-mentioned protruding point, then movable orbiting scroll 230 continues to recover rotary motion trace, without movable orbiting scroll
The situation of 230 scroll wrap and the vortex interference of tooth of fixed scroll 210, can so reduce the scroll wrap of fixed scroll 210 and dynamic whirlpool
The machining accuracy of the scroll wrap of disk 230 so that handling ease.In addition, because of gas pressure and suction muffler in middle pressure chamber 270 at this time
Gas pressure pressure difference is smaller in 250, even if the scroll wrap and movable orbiting scroll of the fixed scroll 210 between middle pressure chamber 270 and suction muffler 250
230 scroll wrap forms gap, will not cause the leakage of gas in middle pressure chamber 270, the gas being both inhaled into can fully enter
Compression process, can still ensure inspiratory capacity close to theoretical value.In 200 real-world operation of screw compressor, screw compressor 200
It is to be in continuous air-breathing, compression and the work of exhaust.When middle pressure chamber 270 starts primary compression gas, discharge chamber 290 is also located
Compressed and the stage of exhaust in continuous, at this time because the scroll wrap of fixed scroll 210 between discharge chamber 290 and middle pressure chamber 270 and
Movable orbiting scroll 230 scroll wrap engagement, i.e. middle pressure chamber 270 and discharge chamber 290 is completely isolated, the gases at high pressure in discharge chamber 290 without
Method is driven in the wrong direction into middle pressure chamber 270, so that the gases at high pressure in discharge chamber 290 are all discharged No leakage, so as to ensure
Capacity is close to theoretical value.
As shown in Figure 2 to Figure 3, during the second center head section A ' B ' are rotated along the first center inner circle segmental arc BC,
Gap 3, the second center head section A ' B ' and first are formed between first center head section AB and the second center inner circle segmental arc B ' C '
Gap 4, the scroll wrap of the fixed scroll 210 between suction muffler 250 and middle pressure chamber 270 and dynamic whirlpool are formed between the inner circle segmental arc BC of center
The scroll wrap engagement of disk 230.
During the second center head section A ' B ' are rotated along the first center inner circle segmental arc BC, suction muffler 250 gradually closes
Close, one time air-breathing terminates, and middle pressure chamber 270 starts to strengthen compressed gas, and gradually exhaust terminates discharge chamber 290.In the process, by
Gap 3, the second center head section A ' B ' and the are formed between the first center head section AB and the second center inner circle segmental arc B ' C '
Gap 4 is formed between one center inner circle segmental arc BC, on the one hand, so that movable orbiting scroll 230 is by main shaft drives when being rotated, movable orbiting scroll
230 towards the head of the scroll wrap of movable orbiting scroll 230 close to the direction on the head of the scroll wrap of fixed scroll 210 close proximity to fixed scroll
210, it is ensured that the scroll wrap of the fixed scroll 210 between suction muffler 250 and middle pressure chamber 270 and the scroll wrap of movable orbiting scroll 230 are filled
Divide engagement.Meanwhile first will not interfere between center head section AB and the second center inner circle segmental arc B ' C ', the second center
It will not be interfered between head sections A ' B ' and the first center inner circle segmental arc BC.On the other hand, even if the vortex of fixed scroll 210
The scroll wrap of tooth and movable orbiting scroll 230 is there are mismachining tolerance, such as scroll wrap wall thickness increase or the movable orbiting scroll 230 of fixed scroll 210
Scroll wrap wall thickness increases (i.e. there are protruding point on the scroll wrap wall of fixed scroll 210 or movable orbiting scroll 230), due to the first central head
There are gap 3, the second center head section A ' B ' and the first center inner circle segmental arc between section AB and the second center inner circle segmental arc B ' C '
There are gap 4, movable orbiting scroll 230 between BC can step down when rotating, and avoid above-mentioned protruding point, then movable orbiting scroll 230 continues extensive
Multiple rotary motion trace, without movable orbiting scroll 230 scroll wrap and fixed scroll 210 vortex interference of tooth situation, so can be with
Reduce the machining accuracy of the scroll wrap of fixed scroll 210 and the scroll wrap of movable orbiting scroll 230 so that handling ease.In addition, because at this time
Middle pressure chamber 270 comes into the reinforcing compression stage of gas, and gas pressure is very high in middle pressure chamber 270, but middle pressure chamber 270 and suction
Isolate between air cavity 250, the gas in middle pressure chamber 270 can not be leaked out by suction muffler 250, and the gas being inhaled into is effectively ensured
Body is compressed completely.As gas is gradually pushed into discharge chamber 290, gas still continues in middle pressure chamber 270 and discharge chamber 290
Compression, and prepare to discharge.And there are gap 3 between the first center head section AB and the second center inner circle segmental arc B ' C ', in second
Between mind section A ' B ' and the first center inner circle segmental arc BC there are gap 4, leaked to even if gas is micro in discharge chamber 290
Chamber 270 is pressed, can be also again pushed into discharge chamber 290 and discharged, the leakage of gas in middle pressure chamber 270 will not be caused, be both inhaled into
Gas all can be compressed and be discharged.
Therefore, above-mentioned screw compressor 200, when screw compressor 200 operates, can ensure that the gas of all suctions is complete
Portion is compressed and is all discharged, and ensure that the design discharge capacity of screw compressor 200 so that the compression effect of screw compressor 200
Fruit is preferable.Simultaneously because effective gap is devised between fixed scroll 210 and the scroll wrap of movable orbiting scroll 230 so that movable orbiting scroll 230
It can step down when rotated, the protruding point on the scroll wrap wall of fixed scroll 210 caused by avoiding machining deviation or movable orbiting scroll 230,
So as to avoid the interference caused by machining deviation between the scroll wrap of fixed scroll 210 and the scroll wrap of movable orbiting scroll 230 and mill
Damage, avoids the problem of power consumption caused by interfering and wearing is higher, extends the service life of screw compressor 200.In addition,
Due to devising effective gap between fixed scroll 210 and the scroll wrap of movable orbiting scroll 230, additionally it is possible to reduce fixed scroll 210 and move
The machining accuracy of whirlpool disk 230 so that handling ease.
As shown in Figures 1 to 5, the scroll wrap molded line of fixed scroll 210 further includes the outer line segment DE of line segment FG and first in first,
Heads of the outer line segment DE of line segment FG and first away from fixed scroll 210 in first；The scroll wrap molded line of movable orbiting scroll 230 further includes
The outer line segment F ' G ' of line segment D ' E ' and second in two, the outer line segment F ' G ' of line segment D ' E ' and second are away from movable orbiting scroll 230 in second
Head, line segment FG in first, the second outer line segment F ' G ', line segment D ' E ' long enoughs in the first outer line segment DE and second, and in dynamic whirlpool
During disk 230 is rotating with respect to fixed scroll 210, line segment D ' E ' are engaged with the first outer line segment DE in second, the second outer line segment
F ' G ' are engaged with line segment FG in first；Turn in the second center head section A ' B ' from the state for departing from the first center inner circle segmental arc BC
Move to the second center head section A ' B ' and start during being rotated along the first center inner circle segmental arc BC, line segment FG and second in first
Gap 1 is formed between outer line segment F ' G ', formation gap 2 between the outer line segment DE of line segment D ' E ' and first in second.In suction muffler 250
Open during carrying out air-breathing, the scroll wrap of the fixed scroll 210 between suction muffler 250 and middle pressure chamber 270 and movable orbiting scroll 230
There are the scroll wrap and movable orbiting scroll in gap, i.e. fixed scroll 210 between guarantee discharge chamber 290 and middle pressure chamber 270 all the time for scroll wrap
230 scroll wrap engagement, and can guarantee that and will not be interfered between fixed scroll 210 and movable orbiting scroll 230.
, can be in fixed scroll 210 and movable orbiting scroll 230 when designing the scroll wrap molded line of fixed scroll 210 and movable orbiting scroll 230
On the basis of scroll wrap molded line, the first center head section AB and the second center head section A ' B ' is reduced to scroll wrap wall thickness respectively
Direction retraction pre-determined distance, by the outer line segment F ' G ' of line segment FG or second in first to the direction retraction reduced after scroll wrap wall in advance
If distance, the outer line segment DE of line segment D ' E ' or first in second are retracted pre-determined distance to the direction reduced after scroll wrap wall.In this way,
Effective clearance can be formed between the scroll wrap of fixed scroll 210 and the scroll wrap of movable orbiting scroll 230 so that the first center head section
Gap 3, the second center head section A ' B ' and the first center inner circle segmental arc BC are formed between AB and the second center inner circle segmental arc B ' C '
Between form gap 4, formation gap 1 between the outer line segment F ' G ' of line segment FG and second in first, line segment D ' E ' and first in second
Gap 2 is formed between outer line segment DE.
The size in the gap 3 between the first center head section AB and the second center inner circle segmental arc B ' C ' arrives 0.2mm 0.01
In the range of, the size in the gap 4 between the second center head section A ' B ' and the first center inner circle segmental arc BC arrives 0.2mm 0.01
In the range of.The size in the gap 1 in first between the outer line segment F ' G ' of line segment FG and second in the range of 0.01 to 0.2mm,
The size in the gap 2 in second between the outer line segment DE of line segment D ' E ' and first is in the range of 0.01 to 0.2mm.In this way, each
Gap size so as to not only ensure effectively engage between fixed scroll 210 and movable orbiting scroll 230, but also can prevent in less scope
Gas leakage caused by only the width value of each gap size is excessive.
Fixed scroll 210 and the scroll wrap of movable orbiting scroll 230 are cross-section scroll wrap, the first center head section AB, in first
Line segment FG, the first outer line segment DE are same circle involute, the second center head section A ' B ', line segment D ' E ', second in second
Outer line segment F ' G ' are same circle involute.Gap between first center head section AB and the second center inner circle segmental arc B ' C '
The size in the gap 4 between 3 size, the second center head section A ' B ' and the first center inner circle segmental arc BC, line segment FG in first
Gap 2 in the size and second in the gap 1 between the second outer line segment F ' G ' between the outer line segment DE of line segment D ' E ' and first
It is equal sized.In this way, the scroll wrap molded line that can cause fixed scroll 210 is uniform, prismatic, the vortex of movable orbiting scroll 230
Flute profile line is uniform, prismatic, it is ensured that stability of the movable orbiting scroll 230 when being operated around fixed scroll 210, further avoids quiet
Interference and abrasion between whirlpool disk 210 and movable orbiting scroll 230.
In one embodiment, fixed scroll 210 and the scroll wrap of movable orbiting scroll 230 are variable cross-section scroll wrap, the first center
Head sections AB, the first center inner circle segmental arc BC, in first the outer line segment DE of line segment FG and first be respectively the basic circle of different radii gradually
Burst at the seams, the second center head section A ' B ', the second center inner circle segmental arc B ' C ', the outer line segment F ' G ' of line segment D ' E ' and second points in second
Not Wei different radii circle involute.Gap 3 between first center head section AB and the second center inner circle segmental arc B ' C '
Size is the first preset value.The size in the gap 4 between the second center head section A ' B ' and the first center inner circle segmental arc BC is the
Two preset values.In the present embodiment, the first preset value and the second preset value are equal.In first the outer line segment F ' G ' of line segment FG and second it
Between the direction of the size from the head of fixed scroll 210 to afterbody in gap 1 be gradually reduced；Line segment D ' E ' and the first outside line in second
Direction of the size in the gap 2 between section DE from the head of fixed scroll 210 to afterbody is gradually reduced.Open and inhale in suction muffler 250
During gas, middle pressure chamber 270 and discharge chamber 290 also begin to compress and are vented, thus the gas pressure in middle pressure chamber 270 compared with
Greatly.The scroll wrap and fixed scroll 210 of movable orbiting scroll 230 between suction muffler 250 and the middle pressure chamber 270 adjacent with the suction muffler 250
Scroll wrap between gap it is smaller, you can leaked to reducing by gap 1 and gap 2 from middle pressure chamber 270 in suction muffler 250
Gas so that actual inspiratory capacity is more nearly with design load so that compression effectiveness is preferable.
It should be noted that the scroll wrap molded line of fixed scroll 210 and the scroll wrap molded line of movable orbiting scroll 230 are not limited to circle
Involute or reducing circle involute or other molded line, such as Made up of Line Segment Involute or combination profile etc..
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the utility model, its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (8)
1. a kind of screw compressor, it is characterised in that including fixed scroll and movable orbiting scroll, the fixed scroll and the movable orbiting scroll coordinate
Together, the scroll wrap of movable orbiting scroll fixed scroll revolution relatively, the scroll wrap of the movable orbiting scroll and the fixed scroll from
Afterbody to cephalad direction cooperatively forms suction muffler, middle pressure chamber and discharge chamber；The scroll wrap molded line of the fixed scroll is included in first
Mind section and the first center inner circle segmental arc；The scroll wrap molded line of the movable orbiting scroll includes the second center head section and the second center
Inner circle segmental arc；
In the second center head section second center head is turned to from the state for departing from the first center inner circle segmental arc
Section starts during being rotated along the first center inner circle segmental arc, described quiet between medium pressure chamber and the suction muffler
The scroll wrap of whirlpool disk and the scroll wrap of the movable orbiting scroll form gap, the quiet whirlpool between the discharge chamber and medium pressure chamber
The scroll wrap of disk and the engagement of the scroll wrap of the movable orbiting scroll；
During the second center head section is rotated along the first center inner circle segmental arc, the first center head section
Form gap between the second center inner circle segmental arc, the second center head section and the first center inner circle segmental arc it
Between form gap, the scroll wrap of the fixed scroll between the suction muffler and medium pressure chamber and the scroll wrap of the movable orbiting scroll
Engagement.
2. screw compressor according to claim 1, it is characterised in that the scroll wrap molded line of the fixed scroll further includes
Line segment and the first outer line segment in one, line segment and the first outer line segment head away from the fixed scroll in described first；Institute
The scroll wrap molded line for stating movable orbiting scroll further includes line segment and the second outer line segment in second, line segment and second outside line in described second
Heads of the Duan Jun away from the movable orbiting scroll, and during the relatively described fixed scroll of the movable orbiting scroll is rotating, in described second
Line segment is engaged with the described first outer line segment, and the second outer line segment is engaged with line segment in described first；
In the second center head section second center head is turned to from the state for departing from the first center inner circle segmental arc
Section starts during being rotated along the first center inner circle segmental arc, in described first between line segment and the second outer line segment
Gap is formed, gap is formed between line segment and the first outer line segment in described second.
3. screw compressor according to claim 2, it is characterised in that in the first center head section and described second
Gap size between intracardiac arc section is in the range of 0.01 to 0.2mm, in the second center head section and described first
Gap size between intracardiac arc section is in the range of 0.01 to 0.2mm.
4. screw compressor according to claim 2, it is characterised in that line segment and the described second outer line segment in described first
Between gap size in the range of 0.01 to 0.2mm, the gap in described second between line segment and the first outer line segment
Size is in the range of 0.01 to 0.2mm.
5. the screw compressor according to claim 3 or 4, it is characterised in that the whirlpool of the fixed scroll and the movable orbiting scroll
It is cross-section scroll wrap to revolve tooth；Gap size between the first center head section and the second center inner circle segmental arc,
Gap size between the second center head section and the first center inner circle segmental arc, line segment and described the in described first
Gap size in gap size and described second between two outer line segments between line segment and the described first outer line segment is equal.
6. screw compressor according to claim 5, it is characterised in that in the first center head section, described first
Intracardiac arc section, line segment, the first outer line segment are same circle involute in described first, second central head
Section, the second center inner circle segmental arc, line segment, the second outer line segment are same circle involute in described second.
7. the screw compressor according to claim 3 or 4, it is characterised in that the whirlpool of the fixed scroll and the movable orbiting scroll
It is variable cross-section scroll wrap to revolve tooth；Gap size between the first center head section and the second center inner circle segmental arc is
First preset value；Gap size between the second center head section and the first center inner circle segmental arc is default for second
Value；Direction of the gap size from the head of the fixed scroll to afterbody in described first between line segment and the second outer line segment
It is gradually reduced；Gap size in described second between line segment and the first outer line segment is from the head of the fixed scroll to afterbody
Direction be gradually reduced.
8. screw compressor according to claim 7, it is characterised in that in the first center head section, described first
Intracardiac arc section, line segment and the first outer line segment are respectively the circle involute of different radii in described first, and described second
Center head section, the second center inner circle segmental arc, line segment and the second outer line segment are respectively different radii in described second
Circle involute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721165201.2U CN207333183U (en) | 2017-09-12 | 2017-09-12 | Screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721165201.2U CN207333183U (en) | 2017-09-12 | 2017-09-12 | Screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207333183U true CN207333183U (en) | 2018-05-08 |
Family
ID=62368887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721165201.2U Withdrawn - After Issue CN207333183U (en) | 2017-09-12 | 2017-09-12 | Screw compressor |
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| Country | Link |
|---|---|
| CN (1) | CN207333183U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559191A (en) * | 2017-09-12 | 2018-01-09 | 上海光裕汽车空调压缩机股份有限公司 | The modification method of screw compressor and its scroll wrap molded line |
| CN108843566A (en) * | 2018-07-31 | 2018-11-20 | 苏州中成新能源科技股份有限公司 | A kind of pitches vortex sound disk |
-
2017
- 2017-09-12 CN CN201721165201.2U patent/CN207333183U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559191A (en) * | 2017-09-12 | 2018-01-09 | 上海光裕汽车空调压缩机股份有限公司 | The modification method of screw compressor and its scroll wrap molded line |
| CN107559191B (en) * | 2017-09-12 | 2023-11-24 | 上海光裕汽车空调压缩机有限公司 | Scroll compressor and modification method of scroll wrap profile thereof |
| CN108843566A (en) * | 2018-07-31 | 2018-11-20 | 苏州中成新能源科技股份有限公司 | A kind of pitches vortex sound disk |
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Address after: 200042 No. 220, new Dian Road, North Development Zone, Jiading District, Shanghai Patentee after: Shanghai Guangyu Automobile Air Conditioning Compressor Co.,Ltd. Address before: 200042 No. 220, new Dian Road, North Development Zone, Jiading District, Shanghai Patentee before: SHANGHAI GUANGYU AUTOMOBILE AIR CONDITIONING COMPRESSOR Co.,Ltd. |
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| AV01 | Patent right actively abandoned | ||
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Granted publication date: 20180508 Effective date of abandoning: 20231124 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180508 Effective date of abandoning: 20231124 |