CN107630814A - Screw compressor, throttle structure and air conditioner - Google Patents
Screw compressor, throttle structure and air conditioner Download PDFInfo
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- CN107630814A CN107630814A CN201710788796.5A CN201710788796A CN107630814A CN 107630814 A CN107630814 A CN 107630814A CN 201710788796 A CN201710788796 A CN 201710788796A CN 107630814 A CN107630814 A CN 107630814A
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- drainage channel
- bearing
- casing
- screw compressor
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Abstract
The invention provides a kind of screw compressor, throttle structure and air conditioner, wherein screw compressor includes：Housing, housing include casing and nose cover, are provided with the first air entry on casing, first row gas port and the exhaust oil back chamber connected with first row gas port are provided with nose cover；Fixed scroll and orbiter are arranged in casing, and the second air entry connected with the first air entry and the second exhaust port connected with first row gas port are provided with fixed scroll；Motor and rotating shaft are arranged in casing, and motor-driven rotatable shaft rotates and drives orbiter to rotate, and clutch shaft bearing is provided with the clutch shaft bearing chamber of support, second bearing is provided with the second bearing chamber of casing；Screw compressor also includes the mistake logical circulation road of connection exhaust oil back chamber and second bearing chamber.Technical scheme efficiently solves the problem of lubricant effect difference of the bottom of shell bearing of compressor in the prior art.
Description
Technical field
The present invention relates to field of air conditioning, in particular to a kind of screw compressor, throttle structure and air conditioner.
Background technology
With new energy development trend, Horizontal electronic screw compressor continues to bring out in market.Air conditioning for automobiles electric scroll pressure
Contracting machine is common poor using fog lubrication mode, lubricant effect.Occur in being run using the electric scroll compressor of fog lubrication
Following problem：
General electric scroll compressor (i.e. air-breathing low-pressure area) can store certain lubricating oil in the cavity for accommodating motor,
The lubrication of compressor carries in profit oil or refrigerant circulation by reserve by refrigerant in operation breathing process and carries oil gas to pump
The lubrication of body and friction pair, lubrication and oil film seal effect are poor.On the other hand, patent CN100344879C is on Moving plate, quiet disk, support
Open up respectively and draw oil passage structure, back pressure cavity and exhaust high pressure oil area are interconnected, compliant scroll disk fortune circles, sound whirlpool
Capstan and support draw oily channel conductive once, and hydraulic oil intermittently is guided into back pressure cavity lubrication bearing and Pressure in Back-pressure Cavity is carried out
Regulation.Another patent CN102308093A it is also proposed another channel design on Moving plate, quiet disk, support makes discharge chambe and the back of the body
Pressure chamber connect, to back pressure chamber supply or a small amount of fuel feeding, with adjust back pressure chamber pressure and improve orbiter operating in lubrication and
Sealing property.And patent CN102116298A thinks that the oily passage that draws that CN100344879C is proposed is imitated to orbiter bearing lubrication
Fruit is still poor, proposes to improve oily access structure on orbiter, fixed scroll.
Above-mentioned patent utilization pressure difference, hydraulic oil is guided into back pressure cavity, the bearing on lubricated cradle and Moving plate.But for casing
The bearing of bottom, the fog lubrication carried in air-breathing refrigerant is only relied on, especially when running at high speed, the lubrication of bottom of shell bearing
It is worse.The problem of lubricant effect difference be present in bottom of shell bearing.
In addition, during compressor operation, contain refrigeration oil in the cold media gas through pump body compression discharge, by being vented oil
During from device, the refrigeration oil in refrigerant accumulates in high pressure gas channel bottom after being separated by oil eliminator, if the refrigeration oil of separation is not
Can return in time in the reserve in compressor, high pressure gas channel bottom it is oily cumulative.Excessive refrigeration oil product is full
On exhaust passage, compressor can be still taken away by refrigerant and is entered in refrigeration system, now oil eliminator separating effect drops significantly
It is low, or even the effect of oil separation can be lost, the problem of causing compressor oil drainage rate big, also make cooling system degradation.Experiment
Verify, can be big in the accumulation of discharge chamber bottom when the high pressure refrigeration oil oil return being separated in compressor on exhaust passage is not smooth
Amount, and compressor oil drainage rate also increases.The compressor of certain oil mass is irrigated, when the hydraulic oil separated on exhaust passage can not
In time return compression in reserve and oil extraction rate oil it is big when, longtime running can cause compressor oil starvation, influence the reliable of compressor
Property.
The content of the invention
The present invention is intended to provide a kind of screw compressor, throttle structure and air conditioner, to solve compressor in the prior art
Bottom of shell bearing lubricant effect difference the problem of.
To achieve these goals, according to an aspect of the invention, there is provided a kind of screw compressor, including：Housing,
Housing includes casing and the nose cover being connected with casing, is provided with the first air entry on casing, first row is provided with nose cover
Gas port and the exhaust oil back chamber connected with first row gas port；Fixed scroll and orbiter, are arranged in casing, on fixed scroll
It is provided with the second air entry connected with the first air entry and the second exhaust port connected with first row gas port；Support, set
In the side of orbiter the first air entry of direction；Motor and rotating shaft, are arranged in casing, and motor-driven rotatable shaft rotates, rotating shaft
First end penetrate support and drive orbiter to rotate, be provided with clutch shaft bearing between the first end and support of rotating shaft, first
Bearing is contained in the clutch shaft bearing chamber of support, and second bearing is provided between the second end of rotating shaft and casing, and second bearing is held
It is contained in the second bearing chamber of casing；Wherein, screw compressor also includes the excessively stream of connection exhaust oil back chamber and second bearing chamber
Path, cross logical circulation road include be arranged in nose cover the first drainage channel, be arranged on fixed scroll the second drainage channel,
The 4th drainage channel for connecting the 3rd drainage channel of the second drainage channel and clutch shaft bearing chamber and being arranged in rotating shaft, the 4th
Drainage channel connects clutch shaft bearing chamber and second bearing chamber.
Further, the first communicating passage is provided with support, the 3rd drainage channel passes through the first communicating passage and first
Bearing bore is connected.
Further, the 3rd drainage channel is formed in support.
Further, the drainage channel of part the 3rd is formed in support, and remainder is formed in drainage tube.
Further, be provided with 3rd bearing chamber on orbiter, screw compressor also include connection 3rd bearing chamber and
Cross the 5th drainage channel of logical circulation road.
Further, a part of 5th drainage channel sets in the bracket and is connected with crossing logical circulation road, a part the 5th
Drainage channel is arranged in orbiter.
Further, the 5th drainage channel is arranged in orbiter and is connected with crossing logical circulation road.
Further, the 5th drainage channel sets in the bracket and is connected with crossing logical circulation road.
Further, first seal is provided between support and orbiter, the second company is provided with first seal
Circulation passage, cross logical circulation road and connected by the second communicating passage with the 5th drainage channel.
Further, throttle part is provided with the first drainage channel and/or the 5th drainage channel, to reduce the first drainage
The flow velocity of lubricating oil in passage and/or the 5th drainage channel.
According to another aspect of the present invention, there is provided a kind of throttle structure, including：Head, thread segment and it is arranged on head
Linkage section between portion and thread segment, the external diameter of thread segment are less than the radial dimension on head；Oilhole, it is arranged on head and linkage section
In, the first end of oilhole is extended on the end face on head, and the second end of oilhole is extended in the peripheral surface of linkage section.
Further, oilhole includes along the radial direction oil hole radially extended of linkage section and axially axially extending along head
Oilhole, radial direction oil hole are connected with axial oilhole.
Further, head is cylinder.
According to another aspect of the present invention, there is provided a kind of screw compressor, including：Housing, housing include casing and with
The nose cover of casing connection, is provided with the first air entry on casing, first row gas port and and first exhaust is provided with nose cover
The exhaust oil back chamber of mouth connection；Fixed scroll and orbiter, are arranged in casing, are provided with fixed scroll and the first air-breathing
Second air entry of mouth connection and the second exhaust port connected with first row gas port；Support, orbiter is arranged on towards the
The side of one air entry；Motor and rotating shaft, are arranged in casing, and motor-driven rotatable shaft rotates, and the first end of rotating shaft penetrates support
And drive orbiter to rotate, clutch shaft bearing is provided between the first end and support of rotating shaft, clutch shaft bearing is contained in support
In clutch shaft bearing chamber, second bearing is provided between the second end of rotating shaft and casing, second bearing is contained in the second axle of casing
Hold in chamber；Wherein, screw compressor also includes the mistake logical circulation road of connection exhaust oil back chamber and second bearing chamber, and crossing logical circulation road includes
The first drainage channel being arranged in nose cover, the second drainage channel, the second drainage channel of connection that are arranged on fixed scroll
With the 3rd drainage channel of clutch shaft bearing chamber and the 4th drainage channel being arranged in rotating shaft, the 4th drainage channel connection first
Throttle structure is provided with bearing bore and second bearing chamber, the first drainage channel and/or the 3rd drainage channel, throttle structure is upper
The throttle structure stated.
According to another aspect of the present invention, there is provided a kind of air conditioner, including compressor, compressor are above-mentioned scroll compression
Contracting machine.
Further, air conditioner is on-board air conditioner.
Apply the technical scheme of the present invention, the lubricating oil in housing with enter screw compressor refrigerant within the compressor
Flowing, finally converge in exhaust oil back chamber.Circulated between the exhaust oil back chamber and second bearing chamber of screw compressor by crossing
Road connects, and the lubricating oil in exhaust oil back chamber is back in second bearing chamber, is effectively guaranteed in second bearing chamber
Lubricants capacity, and then ensure that the lubricant effect of second bearing, solve the problems, such as second bearing insufficient lubrication.Meanwhile excessively stream
Passage include connection exhaust oil back chamber and clutch shaft bearing chamber the first drainage channel, the second drainage channel and the 3rd drainage channel with
And the 4th drainage channel of connection clutch shaft bearing chamber and second bearing chamber.The profit for making flow channels to be effectively vented in oil back chamber
Lubricating oil is directed in second bearing and clutch shaft bearing, and lubricating oil can be avoided, which to concentrate on exhaust oil back chamber, causes motor and other knots
Lubrication shortage of oil between structure, solve the problems, such as compressor internal lubrication oil circulation oil return difficulty, improve compressor longtime running
Reliability.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the cross section structure diagram of the embodiment one of the screw compressor according to the present invention；
Fig. 2 shows the first angle structural representation of the support of Fig. 1 screw compressor；
Fig. 3 shows the second angle structural representation of Fig. 2 support；
Fig. 4 shows the decomposition texture schematic diagram of the support of Fig. 1 screw compressor, first seal and orbiter；
Fig. 5 shows the cross section structure diagram of the embodiment two of the screw compressor according to the present invention；
Fig. 6 shows the decomposition texture schematic diagram of the support of Fig. 5 screw compressor, first seal and orbiter；
Fig. 7 shows the first structural representation of Fig. 6 seal；
Fig. 8 shows second of structural representation of Fig. 6 seal；
Fig. 9 shows the cross section structure diagram of the embodiment three of the screw compressor according to the present invention；
Figure 10 shows the cross section structure diagram of the example IV of the screw compressor according to the present invention；
Figure 11 shows the structural representation of the embodiment of the throttle structure according to the present invention；And
Figure 12 shows the cross section structure diagram of Figure 11 throttle structure.
Wherein, above-mentioned accompanying drawing marks including the following drawings：
1st, casing；2nd, nose cover；201st, exhaust passage；202nd, the first drainage channel；203rd, first row gas port；3rd, oil gas point
From device；4th, throttle part；401st, axial oilhole；402nd, radial direction oil hole；403rd, thread segment；404th, tooth bottom；405th, crest portion；
406th, head；407th, linkage section；5a, second seal；5b, the 3rd seal；5c, the 4th seal；5d, the 5th seal；
6th, fixed scroll；601st, the second drainage channel；602nd, second exhaust port；7th, orbiter；701st, axial oilhole；702nd, it is radially oily
Hole；703rd, axial oilhole；704th, middle pressure hole；8th, first seal；801st, through hole；802nd, through hole；803rd, oil groove；9th, support；
901st, axial oilhole；902nd, radial direction oil hole；903rd, axial oilhole；904th, the 3rd drainage channel；905th, axial oil duct；906th, radially
Oil duct；907th, radial direction oil hole；10th, clutch shaft bearing；10a, inner shield ring；11st, cover plate；11a, through hole；11b, through hole；12nd, rotating shaft；
12a, radial direction oil hole；12b, axial oilhole；12c, radial direction oil hole；13rd, second bearing；14th, motor；15th, eccentric block；16th, bearing pin；
17th, drainage tube；A, it is vented oil back chamber；B, low-pressure oil storage area；Ps, air-breathing low-pressure area；Pm, Zhong Ya back pressure area；Pd, exhaust high pressure
Area.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the application and its application or makes
Any restrictions.Based on the embodiment in the application, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belong to the scope of the application protection.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
Unless specifically stated otherwise, the part and positioned opposite, the digital table of step otherwise illustrated in these embodiments
Up to the unlimited scope of the present application processed of formula and numerical value.Simultaneously, it should be appreciated that for the ease of description, each portion shown in accompanying drawing
The size divided not is to be drawn according to the proportionate relationship of reality.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, the technology, method and apparatus should be considered as authorizing explanation
A part for book.In shown here and discussion all examples, any occurrence should be construed as merely exemplary, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：Similar label
Similar terms is represented in following accompanying drawing with letter, therefore, once it is defined in a certain Xiang Yi accompanying drawing, then subsequent attached
It need not be further discussed in figure.
Embodiment one：
As shown in figure 1, the screw compressor of embodiment one includes housing, fixed scroll 6, orbiter 7, support 9, motor
14 and rotating shaft 12.Wherein, housing includes casing 1 and the nose cover 2 being connected with casing 1, and the first air entry is provided with casing 1,
The exhaust oil back chamber A that first row gas port 203 is provided with nose cover 2 and is connected with first row gas port 203.Fixed scroll 6 and dynamic
Scroll plate 7 is arranged in casing 1, the second air entry for being connected with the first air entry is provided with fixed scroll 6 and with first
The second exhaust port 602 of exhaust outlet connection.Support 9 is arranged on orbiter 7 towards the side of the first air entry.Motor 14 and turn
Axle 12 is also disposed in casing 1, and the drive shaft 12 of motor 14 rotates, and the first end of rotating shaft 12 penetrates support 9 and drives dynamic vortex
Disk 7 rotates.Clutch shaft bearing 10 is provided between the first end and support 9 of rotating shaft 12, clutch shaft bearing 10 is contained in the first of support 9
In bearing bore, second bearing 13 is provided between the second end of rotating shaft 12 and casing 1, second bearing 13 is contained in the of casing 1
In two bearing bores.Screw compressor also includes the mistake logical circulation road of connection exhaust oil back chamber A and second bearing chamber, and crossing logical circulation road includes
The first drainage channel 202 for being arranged in nose cover 2, the second drainage channel 601 being arranged on fixed scroll 6, connection second
3rd drainage channel 904 of drainage channel 601 and clutch shaft bearing chamber and the 4th drainage channel being arranged in rotating shaft 12, the 4th
Drainage channel connects clutch shaft bearing chamber and second bearing chamber.
Using the technical scheme of the present embodiment, lubricating oil in housing is with entering the refrigerant of screw compressor in compressor
Middle flowing, finally converge in exhaust oil back chamber A.Passed through between the exhaust oil back chamber A and second bearing chamber of screw compressor
Logical circulation road connects, and the lubricating oil in exhaust oil back chamber A is back in second bearing chamber, is effectively guaranteed second bearing
Lubricants capacity in chamber, and then the lubricant effect of second bearing 13 is ensure that, solve the problems, such as the insufficient lubrication of second bearing 13.Together
When, flow channels include the first drainage channel 202, the and of the second drainage channel 601 of connection exhaust oil back chamber A and clutch shaft bearing chamber
3rd drainage channel 904 and the 4th drainage channel of connection clutch shaft bearing chamber and second bearing chamber.Make flow channels effectively
The lubricating oil being vented in oil back chamber A is directed in second bearing 13 and clutch shaft bearing 10, lubricating oil can be avoided to concentrate on row
Gas oil back chamber A causes the lubrication shortage of oil between motor 14 and other structures, solves the oil circulation oil return of compressor internal lubrication and is stranded
The problem of difficult, improve the reliability of compressor longtime running.
Specifically, as shown in figure 1, being provided with clutch shaft bearing chamber on the support 9 of the present embodiment, the outer back-up ring of clutch shaft bearing 10
It is interference fitted in clutch shaft bearing chamber, the inner shield ring 10a of clutch shaft bearing 10 is interference fitted in rotating shaft 12, to flow into lubricating oil
Clutch shaft bearing 10, the first communicating passage is provided with the support 9 of the present embodiment.As depicted in figs. 1 and 2, the first of the present embodiment
Communicating passage includes the axially arranged axial oil duct 905 along the support 9 and the radial direction being radially arranged along the support 9
Oil duct 906.Wherein, axial oil duct 905 is arranged in the bearing hole side wall of support 9, and radial direction oil 906 is arranged on the axle of support 9
Bearing bore bottom, radial direction oil 906 are at least extended between the inner shield ring 10a of clutch shaft bearing 10 and outer back-up ring.First drainage channel
It is connected by the first communicating passage with clutch shaft bearing chamber, in the presence of pressure difference, the lubricating oil in exhaust oil back chamber A passes through above-mentioned
First communicating passage flows into clutch shaft bearing 10, and flows to second bearing chamber by clutch shaft bearing chamber.
Specifically, as shown in Figure 1 and Figure 4, the 3rd drainage channel 904 of the present embodiment is formed in support 9 and tilted and sets
Put, to connect the port of the second drainage channel 601 and clutch shaft bearing chamber.
Further, as shown in figure 1, being additionally provided with cover plate 11 on the support 9 of the present embodiment, cover plate 11, rotating shaft 12 and
Support 9 forms the clutch shaft bearing chamber for accommodating clutch shaft bearing 10.Through hole 11a is provided with cover plate 11, makes clutch shaft bearing chamber and casing 1
The air-breathing low-pressure area Ps of interior motor accommodating chamber is connected, and clutch shaft bearing chamber is in low-pressure state.
The 4th drainage channel set in rotating shaft 12 includes radial direction oil hole 12a, radial direction oil hole 12c and the axial oil being connected
Hole 12b, the lubricating oil of clutch shaft bearing intracavitary can through the radial direction oil hole 12a in rotating shaft 12, axial oilhole 12b and radial direction oil hole 12c,
Reach and second bearing 13 is lubricated in the second bearing chamber of the bottom of casing 1, be then refluxed in the low-pressure oil storage area B in casing 1.
Further, as shown in figure 1, being provided with 3rd bearing chamber on the orbiter 7 of the present embodiment, screw compressor is also
Including connection 3rd bearing chamber and the 5th drainage channel for crossing logical circulation road, said structure enables the lubricating oil in exhaust oil back chamber A
Lubrication is enough played to the 3rd bearing on orbiter 7 by the 5th drainage channel.
Specifically, the first end of the rotating shaft 12 of the present embodiment is also equipped with bearing pin 16, and bearing pin is inserted in the pin-and-hole of eccentric block 15,
In the 3rd bearing of the cylindrical shaft end insertion orbiter 7 of eccentric block 15.Bearing pin 16 forms bent axle, electricity with the eccentric setting of rotating shaft 12
Machine 14 drives eccentric block 15 to rotate by rotating shaft 12 and bearing pin 16, in bearing pin 16, eccentric block 15,3rd bearing and anti-self-revolving machine
Orbiter 7 is realized in the presence of structure revolves round the sun around axle.The now scroll wrap portion of fixed scroll 6 and the scroll wrap portion of orbiter 7
Intermeshing, the orbiting and fixed scroll are internally formed the different crescent compression chamber of pressure, under the Continuous Drive of motor 14, fixed scroll
The second air entry on 6 constantly accommodates to suck in the air-breathing low-pressure area Ps of motor 14 out of casing 1 carries certain lubricating oil
Low pressure refrigerant gas, become the gas of HTHP after the orbiting and fixed scroll compresses, finally from the second exhaust of fixed scroll 6
Mouth 602 is discharged in the closed cavity between the back side of fixed scroll 6 and nose cover 2, forms exhaust higher-pressure region Pd.
The cold media gas in the Pd of higher-pressure region is vented through the first row gas port 203 on nose cover 2, enters on nose cover 2 and opens
If exhaust passage 201 in, gs-oil separator 3 is provided with exhaust passage 201, through the refrigerant that ejects of the orbiting and fixed scroll compression
Contain lubricating oil in gas, after gs-oil separator 3, most of lubricating oil is separated in refrigerant, and fraction is by refrigerant band
From compressor, into cooling cycle system.By the grease accumulation that gs-oil separator 3 is separated at the bottom of exhaust passage 201
In the exhaust oil back chamber A in portion, and can be cumulative.If exhaust oil back chamber A is not provided with oily circulating reflux passage, oil can not and
When be back in the low-pressure oil storage area B in casing 1, still compressor can be left by cold media gas band, compressor oil drainage rate can be caused
Big problem.Five drainage channels in the present embodiment lead back the lubricating oil being vented in oil back chamber A in three bearing bores, make lubrication
Oil forms circulation in compression case body, that is, ensures the lubricant effect of three bearings, it also avoid being vented lubricating oil in oil back chamber A
It is excessive and leave compressor with cold media gas, the problem of causing lubricant in compressor to reduce.
Specifically, as shown in Figures 1 to 4, the drainage channel of a part the 5th of the present embodiment be arranged in support 9 and with mistake
Logical circulation road is connected, and a part of 5th drainage channel is arranged in orbiter 7.Because technique limits, the 5th of the present embodiment the
Part of the drainage channel in support 9 includes prolonging along the radial direction oil hole 902 radially extended of support 9 and along the axial direction of support 9
The axial oilhole 901 and axial oilhole 903 stretched, wherein axial oilhole 901 connects the second drainage channel 601 on fixed scroll 6
With radial direction oil hole 902, radial direction oil hole 902 connects the 3rd drainage channel 904 on axial oilhole 901 and support 9, axial oilhole
903 lead to part of the 5th drainage channel in orbiter 7.Part of 5th drainage channel in orbiter 7 includes edge
The axially extending axial oilhole 701 and axial oilhole 703 of orbiter 7 and the radial direction radially extended along orbiter 7
Oilhole 702.Axial oilhole 701 connects axial oilhole 903 and radial direction oil hole 702, and axial oilhole 703 connects 3rd bearing chamber and footpath
To oilhole 702 and point between the inner shield ring of 3rd bearing and outer back-up ring, to improve lubricant effect.
As motor 14 rotates, the public affairs of orbiter 7 circle, and the 5th drainage channel of holder part can be with orbiter
Partial the 5th drainage channel connection is once.This intermittence draws oily mode can provide suitable oil mass to 3rd bearing chamber, full
Each friction lubricating of foot needs, also not because it is continuous draw oil and caused by 3rd bearing chamber long-pending oil it is excessive the problem of.
Further, as shown in Figure 1 and Figure 4, first seal 8 is provided between support 9 and orbiter 7, first is close
The second communicating passage is provided with sealing 8, logical circulation road is crossed and is connected by the second communicating passage with the 5th drainage channel.Specifically,
As shown in Figures 1 to 4, second communicating passage of the present embodiment includes the logical of the second drainage channel 601 of connection and axial oilhole 901
Hole 801 and the through hole 802 of the axial oilhole 903 of connection and axial oilhole 701.
Further, as shown in figure 1, being provided with first drainage channel 202 of the present embodiment and the 3rd drainage channel 904
Throttle part 4, it may make up between the drainage channel 202 of throttle part 4 and first and the side wall of the 3rd drainage channel 904 tiny roundabout
Throttling passage, to reduce the flow velocity of lubricating oil in the first drainage channel 202 and the 3rd drainage channel 904, avoided logical circulation road
The middle too fast oil level rapid decrease for causing to be vented oil back chamber A of lubrication oil flow rate, and then cause the gases at high pressure of exhaust passage 201 to lead to
Cross logical circulation road and enter Zhong Ya back pressures area Pm and air-breathing low-pressure area Ps, and cause different cavity gas blowby body problems.Wherein, the middle pressure back of the body
Nip Pm refers to that the top of support 9 accommodates the formation cavity between the cavity of eccentric block 15 and the back side of orbiter 7.
As shown in Figure 1 and Figure 4, middle pressure hole 704 is additionally provided with the orbiter 7 of the present embodiment, is moved in orbiter 7
During, the intermediate pressure (pressure of the pressure between pressure of inspiration(Pi) and pressure at expulsion) in the orbiting and fixed scroll compression chamber is intermittently
Zhong Ya back pressures area Pm is guided to by middle pressure hole 704, is close to the vortex increment of fixed scroll 6 to realize that orbiter 7 floats upwards
Face, now wear-resisting first seal 8 make end face and dynamic vortex of the first seal 8 all the time with support 9 using the elasticity of itself
The back side fitting of disk 7, keeps contact sealing.
Alternatively, throttle part 4 can be selectively disposed in five drainage channels according to the diameter of drainage channel
In.
Under the difference force effect in high-low pressure area, exhaust oil back chamber A lubricating oil passes through above-mentioned first drainage channel
202nd, after the second drainage channel 601 and throttle part 4, reach in, the 5th drainage channel of low pressure zone shunting, the 3rd drainage
On passage 904.
The flow direction of middle pressure area drainage channel as shown in Figure 1 and Figure 4, hydraulic oil reach the through hole 801 of first seal 8
Enter by the axial oilhole 901 on support 9 in radial direction oil hole 902,7 continuous eccentric motion of compliant scroll disk, lubricating oil passes through
Through hole 802 simultaneously intermittently enters in 3rd bearing chamber to lubricate 3rd bearing along the 5th drainage channel.When axial oilhole 903 with
When axial oilhole 701 misplaces, small part lubricating oil can gather in the accommodating chamber of eccentric block 15, with the rotating eccentricity block of rotating shaft 12
15 can stir the lubricating oil of accumulation and hit down on anti-rotation mechanism, lubricate anti-rotation mechanism.
The flow direction of low pressure zone drainage channel as shown in Figure 1 and Figure 4, hydraulic oil reach the through hole 801 of first seal 8
Enter by the axial oilhole 901 on support 9 in the 3rd drainage channel 904, while also settable section in the 3rd drainage channel 904
Stream unit 4, further the lubricating oil current limliting for flowing to low-pressure area Ps is throttled.Into the 3rd drainage channel 904 on support 9 and warp
Axially oil duct 905 and radial direction oil 906 enter in clutch shaft bearing chamber to lubricate first lubricating oil after the throttling of throttle part 4
Bearing 10.
Entered by the lubricating oil of clutch shaft bearing chamber by the 4th drainage channel and second bearing 13 lubricated in second bearing chamber,
And finally it flow to low-pressure oil storage area B.
The screw compressor of the present embodiment is additionally provided with sealing structure between the said structure of part, so that lubricating oil or cold
Gas body flows according to predefined paths within the compressor.As shown in figure 1, the sealing structure of the present embodiment includes：
The second seal 5a being arranged between nose cover 2 and fixed scroll 6, second seal 5a are circumferentially positioned at first
The junction of the drainage channel 601 of drainage channel 202 and second.
The 3rd seal 5b being arranged on the binding face of the back side of fixed scroll 6 and the end face of nose cover 2, the 3rd sealing
Cavities seals between the back side of fixed scroll 6 and nose cover 2 are formed exhaust higher-pressure region Pd by part 5b.To utilize three regions
Between difference force as power, and combine drainage channel and realize compression power traction oil lubrication or lubrication oil circulation oil return.
The 4th seal 5c in clutch shaft bearing bottom of chamber portion is arranged on, to seal Zhong Ya back pressures area Pm.
The 5th seal 5d in cover plate 11 is embedded, the 5th seal 5d is oil baffle, to prevent lubricating oil too quickly
Clearance backflow between cover plate 11 and rotating shaft 12 makes to store one in clutch shaft bearing chamber into the low-pressure oil storage area B in casing 1
Fixed lubricating oil, ensure that clutch shaft bearing 10 is sufficiently lubricated, excessive lubricating oil can be back to casing 1 from through hole 11a
In interior low-pressure oil storage area B.
Embodiment two：
The screw compressor of embodiment two is mainly changed in arrangement and the first seal 8 of the 5th drainage channel
The second communicating passage arrangement, specifically, as shown in Figure 5 and Figure 6, the 3rd drainage channel 904 of embodiment two is still
Formed in support 9 and be obliquely installed, to connect the port of the second drainage channel 601 and clutch shaft bearing chamber.In first seal 8
The second communicating passage except through hole 801 with include connecting the oil groove 803 of through hole 801 and through hole 802 in addition to through hole 802, by the
Five drainage channels are disposed entirely within orbiter 7, and logical circulation road is connected by the second communicating passage and the 5th drainage channel
It is logical.
As shown in Figure 7 and Figure 8, oil groove 803 can take beeline between through hole 801 and through hole 802 with by through hole 801
Connected with through hole 802.Oil groove 803 can also be that starting point is with through hole 801 around a circle in first seal 8 and with through hole 802
Terminal makes through hole 801 be connected with through hole 802.
Embodiment three：
The screw compressor of embodiment three mainly change the arrangement of the 3rd drainage channel and the 5th drainage channel with
And the arrangement of the second communicating passage in first seal 8 is adaptively changed, specifically, as shown in figure 9, reducing
The materials of support 9, substituted by drainage tube 17 and be arranged on the drainage channel of a part the 3rd in support 9 originally, another part the
Three drainage channels are still formed in support 9 to connect the second drainage channel 601 and drainage tube 17.Specifically, it is arranged in support 9
The 3rd drainage channel include axial oilhole 901 and radial direction oil hole 907.5th drainage channel is disposed entirely within support 9, including
Axial oilhole 901 and radial direction oil hole 902, throttle part 4 is provided with radial direction oil hole 902.So that the 5th drainage channel can be held
Continue and inject lubricating oil into 3rd bearing chamber.
3rd drainage channel and the 5th drainage are in all with one section of axial oilhole 901, correspondingly second in first seal 8
Communicating passage only includes a through hole corresponding to axial oilhole 901.
Example IV：
The screw compressor of example IV changes the arrangement of drainage tube 17, such as Figure 10 on the basis of embodiment three
It is shown, axial oil duct 905, radial direction oil 906 and radial direction oil hole 907 on support 9 are eliminated, is changed to open up on cover plate 11 logical
Through hole 11b is simultaneously inserted in the bottom of drainage tube 17 by hole 11b, injects lubricating oil to realize to clutch shaft bearing chamber.
Present invention also provides a kind of throttle structure, and as shown in figure 11, the throttle structure of the present embodiment includes：Head 406
(external diameter d2), thread segment 403, linkage section 407 (external diameter d3) and oilhole.Wherein, linkage section 407 is arranged on the He of head 406
Between thread segment 403, the external diameter of thread segment 403 is less than the radial dimension on head 406.Oilhole, it is arranged on head 406 and linkage section
In 407, the first end of oilhole is extended on the end face on head 406, and the second end of oilhole extends to the peripheral surface of linkage section 407
On.
For the throttle structure of the present embodiment when being inserted into pipeline, head 406 is to fixed restriction structure, tube wall and screw thread
Tiny path is formed between section 403, and extends the path length of flow of fluid, plays throttling action.
Specifically, as shown in figure 12, the oilhole of the present embodiment includes the radial direction oil hole radially extended along linkage section 407
402 and it is connected along the axially extending axial oilhole 401 in head 406, radial direction oil hole 402 with axial oilhole 401, said structure
It is easy to the processing of throttle structure.
The thread groove optional triangle or trapezoidal of thread segment 403, sectional dimension (i.e. the path d1 of tooth bottom 404, crest portion
405 big footpath d, pitch P) and the aperture D1 of axial oilhole 401, the aperture D2 sizes of radial direction oil hole 402 can be according to actual compressor
The lubricants capacity for being vented oil back chamber A accumulations and the oil mass for supplying friction lubricating or recirculating oil quantity design (can be according to actual compressors
Experimental conditions select optimal design size).Linkage section 407 can be that optical axis section is alternatively thread segment.Head 406 can lead to tube wall
Cross slight interference or helicitic texture step up solid glue water mode connect installation it is fixed on.The generally radially aperture D2 ＜ axles of oilhole 402
To the aperture D1 of oilhole 401.
Preferably, the aperture of radial direction oil hole 402 can select in the range of 0.1mm~1mm, throttle structure thread segment 403
The big footpath d in crest portion 405 is smaller 0.03mm~0.1mm than the internal diameter of pipeline.
Preferably, throttle structure is the cylinder of plastics or metal.
The throttle structure of the present embodiment can be used in throttle part 4 in the screw compressor of the various embodiments described above.Certainly
The throttle structure not shown in other figures can also be used, as long as restriction effect can be played.
By above drainage channel and throttle structure, the hydraulic oil of the exhaust oil back chamber A on nose cover 2 is logical through the first drainage
Road 202, and along after the throttling of thread segment 403 of throttle structure by radial direction oil hole 402 and axial oilhole 401, afterwards along quiet whirlpool
The second drainage channel 601 on capstan 6 enters the 3rd drainage channel and the 5th drainage channel.
Present invention also provides a kind of air conditioner, includes compressor according to the air conditioner (not shown) of the present embodiment,
Compressor is above-mentioned screw compressor.The air conditioner of the present embodiment has the characteristics of reliable long lifespan.
Further, the air conditioner of the present embodiment is on-board air conditioner.
As can be seen from the above description, the above embodiments of the present invention realize following technique effect：
Lubricating oil in housing flows within the compressor with the refrigerant for entering screw compressor, finally converges in and is vented back
In oil pocket.By excessively stream communication between the exhaust oil back chamber and second bearing chamber of screw compressor, make in exhaust oil back chamber
Lubricating oil can be back in second bearing chamber, the lubricants capacity being effectively guaranteed in second bearing chamber, and then ensure that
The lubricant effect of second bearing, solves the problems, such as second bearing insufficient lubrication.Meanwhile flow channels include connection exhaust oil back chamber
The first drainage channel, the second drainage channel and the 3rd drainage channel with clutch shaft bearing chamber and connect clutch shaft bearing chamber and second
4th drainage channel of bearing bore.Make flow channels that the lubricating oil being vented in oil back chamber effectively are directed into second bearing and the
In one bearing, lubricating oil can be avoided, which to concentrate on exhaust oil back chamber, causes lubrication shortage of oil between motor and other structures, solution
Certainly the problem of compressor internal lubrication oil circulation oil return difficulty, the reliability of compressor longtime running is improved.
In the description of the present application, it is to be understood that the noun of locality such as " forward and backward, upper and lower, left and right ", " laterally, vertical,
Vertically, orientation or position relationship indicated by level " and " top, bottom " etc. are normally based on orientation or position shown in the drawings and closed
System, it is for only for ease of description the application and simplifies description, in the case where not making opposite explanation, these nouns of locality do not indicate that
There must be specific orientation with the device or element for implying meaning or with specific azimuth configuration and operation, therefore can not manage
Solve as the limitation to the application protection domain；The noun of locality " inside and outside " refers to relative to inside and outside each part profile in itself.
For the ease of description, space relative terms can be used herein, as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be appreciated that space relative terms are intended to comprising the orientation except device described in figure
Outside different azimuth in use or operation.For example, if the device in accompanying drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after the device of part or construction top " or " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (being rotated by 90 ° or in other orientation), and
And respective explanations are made to the relative description in space used herein above.
Furthermore, it is necessary to explanation, limits parts, it is only for be easy to using the word such as " first ", " second "
Corresponding parts to be distinguished, do not have Stated otherwise such as, above-mentioned word does not have particular meaning, therefore it is not intended that to this
Apply for the limitation of protection domain.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (16)
- A kind of 1. screw compressor, it is characterised in that including：Housing, the housing include casing (1) and the nose cover (2) being connected with the casing (1), set on the casing (1) There is the first air entry, first row gas port (203) is provided with the nose cover (2) and is connected with the first row gas port (203) Exhaust oil back chamber (A)；Fixed scroll (6) and orbiter (7), it is arranged in the casing (1), is provided with the fixed scroll (6) and institute The second exhaust port (602) stated the second air entry of the first air entry connection and connected with the first row gas port；Support (9), the orbiter (7) is arranged on towards the side of first air entry；Motor (14) and rotating shaft (12), it is arranged in the casing (1), the motor (14) drives the rotating shaft (12) to rotate, The first end of the rotating shaft (12) penetrates the support (9) and drives the orbiter (7) to rotate, and the of the rotating shaft (12) Clutch shaft bearing (10) is provided between one end and the support (9), the clutch shaft bearing (10) is contained in the of the support (9) In one bearing bore, second bearing (13), the second bearing are provided between the second end of the rotating shaft (12) and casing (1) (13) it is contained in the second bearing chamber of the casing (1)；Wherein, the screw compressor also includes the mistake logical circulation road for connecting the exhaust oil back chamber (A) and the second bearing chamber, The first drainage channel (202) that logical circulation road includes being arranged in the nose cover (2) described excessively, it is arranged on the fixed scroll (6) the 3rd drainage of the second drainage channel (601), connection second drainage channel (601) and the clutch shaft bearing chamber on Passage (904) and the 4th drainage channel being arranged in the rotating shaft (12), the 4th drainage channel connection described first Bearing bore and the second bearing chamber.
- 2. screw compressor according to claim 1, it is characterised in that be provided with the first connection on the support (9) and lead to Road, the 3rd drainage channel (904) are connected by first communicating passage with the clutch shaft bearing chamber.
- 3. screw compressor according to claim 1, it is characterised in that the 3rd drainage channel (904) is formed in institute State in support (9).
- 4. screw compressor according to claim 1, it is characterised in that part the 3rd drainage channel (904) is formed In the support (9), remainder is formed in drainage tube (17).
- 5. screw compressor according to claim 1, it is characterised in that be provided with the 3rd axle on the orbiter (7) Chamber is held, the screw compressor also includes connecting the 3rd bearing chamber and the 5th drainage channel for crossing logical circulation road.
- 6. screw compressor according to claim 5, it is characterised in that a part of 5th drainage channel is arranged on institute State in support (9) and be connected with the logical circulation road of crossing, a part of 5th drainage channel is arranged on the orbiter (7) In.
- 7. screw compressor according to claim 5, it is characterised in that the 5th drainage channel is arranged on the dynamic whirlpool It is connected in capstan (7) and with the logical circulation road of crossing.
- 8. screw compressor according to claim 5, it is characterised in that the 5th drainage channel is arranged on the support (9) it is connected in and with the logical circulation road of crossing.
- 9. the screw compressor according to any one of claim 6 to 8, it is characterised in that the support (9) and described dynamic First seal (8) is provided between scroll plate (7), the second communicating passage, the mistake are provided with the first seal (8) Logical circulation road is connected by second communicating passage with the 5th drainage channel.
- 10. screw compressor according to claim 5, it is characterised in that first drainage channel and/or the described 5th Throttle part (4) is provided with drainage channel, is lubricated with reducing in first drainage channel and/or the 5th drainage channel The flow velocity of oil.
- A kind of 11. throttle structure, it is characterised in that including：Head (406), thread segment (403) and the linkage section being arranged between the head (406) and the thread segment (403) (407), the external diameter of the thread segment (403) is less than the radial dimension of the head (406)；Oilhole, it is arranged in the head (406) and the linkage section (407), the first end of the oilhole extends to the head On the end face in portion (406), the second end of the oilhole is extended in the peripheral surface of the linkage section (407).
- 12. throttle structure according to claim 11, it is characterised in that the oilhole is included along the linkage section (407) The radial direction oil hole (402) radially extended and along the head (406) axially extending axial oilhole (401), the radial direction Oilhole (402) is connected with the axial oilhole (401).
- 13. throttle structure according to claim 11, it is characterised in that the head (406) is cylinder.
- A kind of 14. screw compressor, it is characterised in that including：Housing, the housing include casing (1) and the nose cover (2) being connected with the casing (1), set on the casing (1) There is the first air entry, first row gas port (203) is provided with the nose cover (2) and is connected with the first row gas port (203) Exhaust oil back chamber (A)；Fixed scroll (6) and orbiter (7), it is arranged in the casing (1), is provided with the fixed scroll (6) and institute The second exhaust port (602) stated the second air entry of the first air entry connection and connected with the first row gas port；Support (9), the orbiter (7) is arranged on towards the side of first air entry；Motor (14) and rotating shaft (12), it is arranged in the casing (1), the motor (14) drives the rotating shaft (12) to rotate, The first end of the rotating shaft (12) penetrates the support (9) and drives the orbiter (7) to rotate, and the of the rotating shaft (12) Clutch shaft bearing (10) is provided between one end and the support (9), the clutch shaft bearing (10) is contained in the of the support (9) In one bearing bore, second bearing (13), the second bearing are provided between the second end of the rotating shaft (12) and casing (1) (13) it is contained in the second bearing chamber of the casing (1)；Wherein, the screw compressor also includes the mistake logical circulation road for connecting the exhaust oil back chamber (A) and the second bearing chamber, The first drainage channel (202) that logical circulation road includes being arranged in the nose cover (2) described excessively, it is arranged on the fixed scroll (6) the 3rd drainage of the second drainage channel (601), connection second drainage channel (601) and the clutch shaft bearing chamber on Passage (904) and the 4th drainage channel being arranged in the rotating shaft (12), the 4th drainage channel connection described first Set in bearing bore and the second bearing chamber, first drainage channel (202) and/or the 3rd drainage channel (904) There is throttle structure, the throttle structure is the throttle structure any one of claim 11 to 13.
- 15. a kind of air conditioner, including compressor, it is characterised in that the compressor be any one of claim 1 to 10 or Screw compressor described in claim 14.
- 16. air conditioner according to claim 15, it is characterised in that the air conditioner is on-board air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710788796.5A CN107630814B (en) | 2017-09-04 | 2017-09-04 | Vortex compressor, throttling structure and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710788796.5A CN107630814B (en) | 2017-09-04 | 2017-09-04 | Vortex compressor, throttling structure and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107630814A true CN107630814A (en) | 2018-01-26 |
| CN107630814B CN107630814B (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710788796.5A Active CN107630814B (en) | 2017-09-04 | 2017-09-04 | Vortex compressor, throttling structure and air conditioner |
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| Country | Link |
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Cited By (6)
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| CN111550404A (en) * | 2019-04-01 | 2020-08-18 | Oet股份有限公司 | Scroll compressor having a plurality of scroll members |
| CN112253465A (en) * | 2020-11-13 | 2021-01-22 | 华域三电汽车空调有限公司 | Compressor oil return structure and compressor |
| CN112879303A (en) * | 2019-11-29 | 2021-06-01 | 比亚迪股份有限公司 | Scroll compressor having a plurality of scroll members |
| CN113482919A (en) * | 2021-08-05 | 2021-10-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Scroll compressor's seal structure, scroll compressor and air conditioner |
| CN113982940A (en) * | 2021-09-10 | 2022-01-28 | 苏州中成新能源科技股份有限公司 | High-efficient lubricated oil circuit structure |
| CN114215757A (en) * | 2021-12-17 | 2022-03-22 | 珠海格力电器股份有限公司 | Oil return structure, compressor and air conditioner |
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| CN113482919A (en) * | 2021-08-05 | 2021-10-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Scroll compressor's seal structure, scroll compressor and air conditioner |
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| CN107630814B (en) | 2023-10-03 |
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