CN106567833B - Rotary compressor and method for improving lubricating effect thereof - Google Patents
Rotary compressor and method for improving lubricating effect thereof Download PDFInfo
- Publication number
- CN106567833B CN106567833B CN201510670523.1A CN201510670523A CN106567833B CN 106567833 B CN106567833 B CN 106567833B CN 201510670523 A CN201510670523 A CN 201510670523A CN 106567833 B CN106567833 B CN 106567833B
- Authority
- CN
- China
- Prior art keywords
- oil
- oil sump
- rotary compressor
- sump
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
- Compressor (AREA)
Abstract
The present invention provides a rotary compressor, comprising: a housing; a compression mechanism; the oil pool is stored with lubricating oil; the rotating shaft is provided with a lubricating oil channel communicated with the oil pool and is supported by an upper bearing seat and a lower bearing seat; and a drive mechanism that drives the compression mechanism via the rotary shaft. The oil sump comprises a first oil sump and a second oil sump, the first oil sump is communicated with the second oil sump through a first oil inlet, a lubricating oil channel leads to the second oil sump, the compressor is further provided with an oil return channel, the oil return channel introduces the high-temperature lubricating oil of the rotary compressor into the second oil sump in the working process of the compressor, and the temperature of the high-temperature lubricating oil is higher than that of the lubricating oil in the first oil sump. The invention also provides a method for improving the lubricating effect of the rotary compressor. According to the present invention, the dilution of the lubricating oil in the lubricating system of the compressor can be reduced, thereby improving the lubricating effect and improving the reliability.
Description
Technical field
The present invention relates to a kind of methods of rotary compressor and the lubricant effect for improving the rotary compressor.
Background technique
When the air-conditioning system for including rotary compressor is run under worst cold case, or the freezing including rotary compressor
When system operates normally, the environment temperature as locating for evaporator is lower, and the fluid refrigerant in evaporator can not carry out sufficiently
It exchanges heat and flashes to gas, a large amount of liquid refrigerant is caused to flow back to compressor, fall into the oil sump of compression motor spindle.At this point,
Oil in oil sump can cause viscosity sharply to decline by liquid refrigerating dilution agent.Oil after viscosity decline is pumped in bearing, is caused
Oil film thickness reduces, or even can not form effective oil film, so as to cause bearing wear failure.In low-temperature heating defrosting,
It will appear similar situation.
In addition, as environmental requirement is more stringent, using low GWP value (the latent value of Global Greenhouse Effect) refrigerant (such as
R32, R447A etc.) it is following trend.However, when the refrigerant of low GWP value is run under heat pump working condition delivery temperature generally compared with
Height needs to reduce suction superheat thus to control delivery temperature, to guarantee the reliability of compressor.However, when reducing air-breathing
When the degree of superheat, the liquid refrigerant evaporation also inevitably led in evaporator is incomplete, and liquid refrigerant flows back to compression
Machine causes to dilute to the oil of oil sump.
Existing solution system, which largely returns liquid, leads to means there are many technologies that oily dilute strength is high in compressor oil sump, but
It is height exhaust temperature when the environmental protection refrigerant that can be brought other defect, and not can solve low GWP value is run under heat pump working condition
The problem of spending.
Summary of the invention
The technical problem to be solved in the present invention
Rotary compressor of the invention can be improved largely return liquid when compressor reliability, improve lubricant effect and
System performance, and especially suitable for being reduced using environmental protection refrigerant using the method for reducing system overheat degree
Delivery temperature is got higher without will lead to oily dilute strength.
Technical solution
The present invention provides a kind of rotary compressors, comprising: shell；Compression mechanism；Oil sump stores lubrication in oil sump
Oil；Rotary shaft is provided with the oil leab being connected to oil sump in rotary shaft, and rotary shaft is by top chock and step branch
It holds；And driving mechanism, driving mechanism drive compression mechanism via rotary shaft.Oil sump includes the first oil sump and the second oil sump, the
One oil sump is connected to the second oil sump via the first oil inlet, and the first oil inlet is configured to allow for lubricating oil from the first oil sump via
One oil inlet is flowed into the second oil sump, and oil leab leads to the second oil sump, and compressor is additionally provided with drainback passage, oil return
The higher temperature lubricating oil of rotary compressor is introduced into the second oil sump by channel in the course of work of compressor, higher temperatures
The temperature of lubricating oil is spent higher than the lubricating oil temperature in the first oil sump.
Optionally, the first oil sump and the second oil sump are separated via separator, and separator is provided with the first oil inlet and second
One end of oil inlet, drainback passage is arranged in the second oil inlet.
Optionally, separator is provided with the exhaust pipe of generally vertical arrangement, and the outlet of exhaust pipe is higher than in the first oil sump
Liquid level.
Optionally, exhaust pipe includes bending section, and outlet is located at the end of bending section and towards vertically below.
Optionally, separator is in substantially hull shape, and has upper opening and under shed, and upper opening is fixed on step,
And under shed is pressed against the bottom surface of shell.
Optionally, separator is in general toroidal plate, and the radially inward edge of separator is fixed on step, radial
Outer edge is fixed to shell.
Optionally, the first oil sump is located at the outside of separator, and the second oil sump is located at the inside of separator.
Optionally, separator is made of heat-barrier material.
Optionally, compressor is scroll compressor.
Optionally, compressor is low-pressure side formula screw compressor.
Optionally, higher temperature lubricating oil level is at the recess portion of top chock, and drainback passage includes oil return pipe.
Optionally, higher temperature lubricating oil level is in the oil eliminator that the exhaust joint with compressor is connected.
Optionally, drainback passage include oil return pipe and with the concatenated capillary decompression portion of oil return pipe.
Optionally, the outside of shell is provided with cylindrical tube, to form shell folder between shell and cylindrical tube
Layer portion, drainback passage include crustless sandwich portion, higher temperature lubricating oil be set where between position and crustless sandwich portion
One oil return pipe, the second oil return pipe being arranged between crustless sandwich portion and the second oil sump.
Optionally, compressor is rotor-type compressor.
Optionally, higher temperature lubricating oil level is at the oil guide groove on the inner wall of top chock.
The present invention also provides a kind of methods of the lubricant effect in raising rotary compressor, and compressor includes: shell；
Compression mechanism；Oil sump stores lubricating oil in oil sump；Rotary shaft is provided with the oil leab being connected to oil sump in rotary shaft, and
And rotary shaft is supported by top chock and step；And driving mechanism, driving mechanism drive compression mechanism via rotary shaft.
This method comprises: oil sump is divided into the first oil sump and the second oil sump, so that the first oil sump and the second oil sump are via the first oil inlet
Mouth connection, the first oil inlet are configured to allow for lubricating oil to be flowed into the second oil sump from the first oil sump via the first oil inlet, moisten
Grease way leads to the second oil sump；And drainback passage is set within the compressor, drainback passage will in the course of work of compressor
The internal or external higher temperature lubricating oil of rotary compressor is introduced into the second oil sump, the temperature of higher temperature lubricating oil
Higher than the lubricating oil temperature in the first oil sump.
Beneficial effect
The rotary compressor provided according to the present invention, by by the higher lubricating oil of temperature in compressor (such as from axis
The lubricating oil that the inside is flowed out is held, due to the effect of bearing internal friction, by the lubricating oil of bearing than having before entering bearing
Certain temperature rise) it backs into the second oil sump, it is mixed with the external first oily lower oil of temperature in pool, and will be mixed
Oil is supplied in lubrication channel, and the lubricating oil in lubrication channel can be greatly reduced by the diluted degree of refrigerant, thus
Lubricant effect is improved, the abrasion of moving component (such as bearing) is reduced, improves reliability.
This separator structures for providing the second oil sump are simple, low in cost, and do not need to existing compression
Machine structure is substantially changed, applied widely.
Detailed description of the invention
By description referring to the drawings, the feature and advantage of one or several embodiments of the invention will become more
It is readily appreciated that, in which:
Fig. 1 shows the sectional view of the rotary compressor of first embodiment according to the present invention；
Fig. 2 shows the enlarged fragmentary cross sections of rotary compressor shown in Fig. 1；
Fig. 3 shows a kind of enlarged fragmentary cross section of modification of separator；
Fig. 4 shows the sectional view of the rotary compressor of second embodiment according to the present invention；
Fig. 5 shows a kind of sectional view of modification of the rotary compressor of second embodiment according to the present invention；
Fig. 6 shows the sectional view of another modification of the rotary compressor of second embodiment according to the present invention；
Fig. 7 shows the sectional view of the rotary compressor of third embodiment according to the present invention；
Fig. 8 shows the sectional view of the rotary compressor of the 4th embodiment according to the present invention.
Specific embodiment
Description related to the preferred embodiment is only exemplary below, and is definitely not to the present invention and its application or usage
Limitation.
In the present specification, the term in the expression orientation such as "upper", "lower" has been used referring to the direction in attached drawing, but unless bright
Really explanation, otherwise the relativeness of the component in the embodiments of the present invention is not limited to direction shown in figure, but can be with
Change is made according to concrete application.
The essential structure of the rotary compressor of first embodiment according to the present invention is described below with reference to Fig. 1.Rotation
Formula compressor 100 includes the shell 110 for being substantially in closed circular tubular, and shell 110 includes being located at the main body 111 at middle part and being fixed to
The top cover 112 and bottom cover 113 of the axial ends of main body.Suction joint 114 is equipped in main body 111, for sucking refrigerant,
And exhaust joint 115 is equipped on top cover 112, for compressed refrigerant to be discharged.Between main body 111 and top cover 112
Be additionally provided with the partition 116 substantially transversely extended, thus by the inner space of compressor housing 110 be separated into high-pressure side and
Low-pressure side.Specifically, the space between top cover 112 and partition 116 constitutes high-pressure side space, and between partition 116 and bottom cover 113
Space constitute low-pressure side space.The bottom of shell 110 is configured with the oil sump 117 for accommodating lubricating oil.
Compression mechanism 120 is equipped in low-pressure side space content and the driving machine of compression mechanism 120 is driven via rotary shaft 130
Structure 140.In the example depicted in fig. 1, compression mechanism 120 includes the determine vortex component 122 and dynamic vortex component being engaged with each other
124.The eccentric crank pin 132 of rotary shaft 130 is inserted into the hub 126 of dynamic vortex component 124 to rotate and drive via bushing 133
Dynamic dynamic vortex component 124.The upper end of rotary shaft 130 is supported by top chock 150, and lower end is supported by step 154.Upper axis
It holds seat 150 and step 154 and shell 110 is fixedly attached to by mode appropriate.Driving mechanism 140 is, for example, motor,
Including being fixed on the stator 142 of shell 110 and being fixed on the rotor 144 of rotary shaft 130.
It is similar with structure in the prior art, oil leab 134 is provided in rotary shaft 130, oil leab 134 includes
Concentric holes 136 positioned at bottom and the eccentric orfice 138 relative to 136 radial deflection of concentric holes (shown in dotted line in Fig. 1), together
Heart hole 136 and oil sump 117 are in fluid communication, and eccentric orfice 138 leads to the eccentric crank pin 132 of rotary shaft 130.In rotary shaft 130
Pump oil mechanism 139 can also be arranged in lower end.In the example depicted in fig. 1, pump oil mechanism 139 is, for example, to be arranged in concentric holes 136
Oil fork 139 that is interior and being rotated together with rotary shaft 130.It should be appreciated by those skilled in the art that pump oil mechanism is without being limited thereto, but
It can be using any mechanism that can be supplied to lubricating oil in the oil leab 134 of rotary shaft 130, such as impeller pump.
In order to solve the environment temperature locating for the evaporator it is lower when, a large amount of refrigerants flow into the oil sump 117 of compressor
And the problem of dilute lubricating oil, present inventor contemplate following solution: in addition to crude oil pond, additional second is arranged
Temperature in compressor assembly higher oily (hereinafter referred to as high temperature oil) is led back the second oil sump by oil sump, and in the second oil sump
It is mixed with the temperature lower oily (hereinafter referred to as low-temperature oil) in crude oil pond, mixed oil is introduced into entering for lubrication channel
Mouthful, for lubricating.On the one hand, the amount of the refrigerant dissolved in high temperature oil is less, on the other hand, since high temperature oil is to low-temperature oil
Heating so that the refrigerant vapor that is dissolved in low-temperature oil and being escaped from oil, therefore, compared with former low-temperature oil, after mixing
Oil contained in refrigerant amount than in the first oil sump than reduce.When being lubricated using mixed oil, oily is viscous
Degree improves, and helps to form effective oil film between moving component, improves lubricant effect, reduces the abrasion of the parts such as bearing.
Specifically, referring to figs. 2 and 3, the oil sump 117 of compressor 100 is divided by separator 160 for the first (position oil sump 117a
In outside) and the second oil sump 117b (internally positioned).Separator 160 can by metal or it is nonmetallic be made, for for second oil
The purpose of pond 117b heat preservation, preferably manufactures separator 160 using heat-barrier materials such as plastics.Thereby, it is possible to reduce from second
The heat that oil sump 117b is conducted to the first oil sump 117a preferably maintains the temperature between the second oil sump 117b and the first oil sump 117a
It is poor to spend.
As shown in Fig. 2, being formed with upper opening 162 at the center upper portion of separator 160, and in the week of upper opening 162
Edge is formed with the upper flange 164 that top extends in the axial direction and the lower flange 166 that lower section extends in the axial direction.Step 154 and
Its internal rotary shaft 130 is inserted into upper opening 162, and passes through matching between flange 164,166 and step 154
It closes and separator 160 is fixed on step 154, O shape can be set between flange 164,166 and step 154
Ring (not shown) is to improve fixed and sealing effect.In addition, under shed 168 is formed at the bottom center of separator 160, point
It the part 169 positioned at 168 periphery of under shed of spacing body 160 can be relatively thin to have certain flexibility.The size of upper flange 164
When being designed so that as its upper axial end and being resisted against step 154, the flexible portion 169 around under shed 168 can be pressed against
Bottom cover 113 deforms, and under shed 168 is closed by bottom cover 113 as a result,.In this way, separator 160 is fixed on step
Between 154 and bottom cover 113 (bottom of shell 110), and the first oil sump 117a and the second oil sump 117b are separated, makes rotary shaft
130 oil leab 134 is directly connected to the second oil sump 117b and keeps apart with the first oil sump 117a (without being directly connected to).
The first oil inlet 170 and the second oil inlet 172 are provided on separator 160.Although shown in figure two into
Hydraulic fluid port is all located at the top of separator 160, it is to be understood that, appointing for separator 160 can be arranged in oil inlet as required
At what position.First oil sump 117a is connected to by the first oil inlet 170 with the second oil sump 117b.The preferred aperture of first oil inlet 170
Diameter, but the demand in time filling into the second oil sump 117b oil lacked should be met.Oil return is provided in the second oil inlet 172
Channel 174, in the form of oil return pipe 174a, lower end is inserted into the second oil inlet 172 drainback passage 174, and upper end passes through upper
Hole 151 in bearing block 150 and lead to the direction of top chock 150 recessed recess portion 152 vertically below (referring to Fig. 1).As a result,
The lubricating oil retained in recess portion 152 can be entered via oil return pipe 174a in the second oil inlet 172.
Oil return pipe 174a extends along the clearance G between the stator 142 and shell 110 of driving mechanism 140, when the profit of needs
Lubricating oil amount is larger and when clearance G is smaller, more than one oil return pipe 174a can be abreast set as required, and can point
Second oil inlet 172 of respective numbers is set on spacing body 160, and oil return pipe 174a is inserted respectively into corresponding second oil inlet 172
In.Part oil return pipe can also design outside compressor housing and solve the problems, such as insufficient space.
Oil return pipe 174a can be the hard tube of metal material, be also possible to the hose of nonmetallic materials.As oil return pipe 174a
When using hose, the upper end of oil return pipe 174a can be fixed to top chock 150 by means of devices such as spring catch (not shown)
In hole 151 in, and the lower end of oil return pipe 174a can be inserted into the second oil inlet 172 in a manner of transition fit.
It should be appreciated that the structure of separator 160 described above is only example.After reading the present invention, Ke Yishe
Separator of different shapes is counted out, as long as it separates the first oil sump 117a and the second oil sump 117b, and is provided with similar
Two oil inlets.For example, separator 160 can also be not provided with the flexible portion 169 of under shed 168 and surrounding,
And it is created as the shell construction of bottom closure.In addition, it illustrates a kind of alternative separator 160, this points referring to Fig. 3
The roughly annular plate of spacing body 160 is fixed to step 154 in its radially inward edge, and radially outward edge is fixed to bottom cover 113
Lug boss.It should be appreciated that the radial outside edge of separator 160 can also be fixed to housing body 111.Point of these structures
Spacing body 160 also can be applied to the second to the 4th embodiment as described below, and will not be described in great detail.
During the work time, when oil fork 139 is rotated with rotary shaft 130, under the drive of oil fork 139, the second oil sump
Oil in 117b is continuously drawn into oil leab 134.It is oily from eccentric crank pin 132 in oil leab 134
End discharge, and it is fed into eccentric crank pin 132, bushing 133, the needs lubrication such as in hub 126 and compression mechanism 120
Position, most of lubricating oil can flow in the recess portion 152 of bearing block 150.Since the friction of bearing is so that lubricating oil becomes temperature
It is higher, so the temperature of the lubricating oil in recess portion 152 is also correspondingly higher, by the lubricating oil of bearing due to a liter moderate pressure change
Change so that the refrigerant dissolved in lubricating oil is reduced.Due to the agitaion of the components such as rotary shaft 130, hub 126, Yi Jiyou
Oil return pipe 174a is entered in the high temperature grease in the swabbing action of oil pumping device 139, the recess portion 152 of top chock 150 (to return
Oily channel 174) in, and returned in the second oil sump 117b along oil return pipe 174a via the second oil inlet 172.That is, being lubricated
Lubricating oil afterwards can return in the second oil sump 117b with " repetition " use, and an additional circulation is formd inside compressor
Oil circuit, the dilute strength of the oil in the circulating oil path is lower than the oily dilute strength in the first external oil sump 117a.It is understood that
In per unit time, the oil mass (calling oil drain quantity Q1 in the following text) that is sucked into oil leab 134 in the second oil sump 117b with via returning
The difference for the oil mass (high temperature oil inlet quantity Q2) that oil pipe 174a is flowed back into the second oil sump 117b is supplied by the oil in the first oil sump 117a.
Due to the swabbing action of oil fork 139, and since the oil level in the first oil sump 117a is higher than the oil level in the second oil sump 117b, because
Oil in this first oil sump 117a can be entered easily in the second oil sump 117b via the first oil inlet 170, this part oil
Hereinafter referred to as low temperature oil inlet quantity Q3.That is, oil drain quantity Q1=high temperature oil inlet quantity Q2+ low temperature oil inlet quantity Q3.Pass through high temperature oil and low-temperature oil
It is mixed in the second oil sump 117b, form oil of the dilute strength lower than the first oil sump 117a of outside and is pumped to oil leab
For lubricating in 134.
The volume of the second oil sump 117b can be optimized by test, to further decrease oily dilute strength.Specifically
Ground, for constant speed compressor, the volume of the second oil sump 117b should not hinder high temperature oil inlet quantity Q2 to return to the second oil sump
It is as small as possible in the case where in 117b, to reduce the amount of " dead oil " for being not involved in circulation in the second oil sump 117b.It is preferred that
The volume on ground, the second oil sump 117b will meet the pumping ability of rotary shaft 130, such as equal to or slightly greater than pumping ability.By
This, can be such that the oily dilute strength in the second oil sump 117b minimizes.It, then need to be according to maximum pumping ability for variable speed compressor
To design the volume of the second oil sump 117b.
Preferably, as shown in Fig. 2, being additionally provided with exhaust pipe 180 on separator 160, for the second oil sump 117b to be discharged
In oil in the gaseous refrigerant that escapes, block high temperature lubricating to avoid due to containing excessive gas in the second oil sump 117b
The reflux of oil influences pumping out for oil.Exhaust pipe 180 is preferably coupled to the top in the space in separator 160, and is vented
The outlet of pipe 180 is higher than the liquid level L of the first oil sump of compressor 117a.Exhaust pipe 180 includes vertical section 182 and is connected to vertical section
The bending section 184 of 182 top, the opening of exhaust pipe 180 is located at the end of bending section 184, and bending section 184 is bent such that
Opening is towards vertically below.It should be appreciated that opening can also be towards any angle between side or side and lower section.It sets in this way
When the advantages of setting is when the oil in the first oil sump 117a shakes or top has oil droplet to fall, oil will not enter exhaust pipe
Exhaust pipe 180 is blocked in 180.Although 172 cloth of exhaust pipe 180 and the first oil inlet 170 and the second oil inlet shown in the figure
It sets in the same plane, but this is only schematical, exhaust pipe 180, the first oil inlet 170 and the second oil inlet 172 can be with
Any relative position is arranged in without influencing its function.
Below with reference to the compressor 200 of Fig. 4-6 description second embodiment according to the present invention, in addition to drainback passage it
Outside, compressor 200 and compressor 100 according to first embodiment are essentially identical, therefore use with the corresponding attached drawing of 2 beginnings
Label will not be repeated again to refer to corresponding element.Exhaust pipe is not shown in figs. 4-6, but it is to be understood that
The exhaust pipe similar with the exhaust pipe 180 in Fig. 2 and Fig. 3 can be set.
Lead to the second oil inlet of separator 260 according to the lower end of the drainback passage 274 of the compressor 200 of second embodiment
Mouthfuls 272, and upper end is not the recess portion for leading to top chock, but lead to compression mechanism 220 for compression process
Downstream.
For example, with reference to Fig. 4, drainback passage 274 can lead to partition 216 be located on high-tension side recess portion 218 at.In compressor
Operation process in, the refrigerant of high temperature and pressure being discharged from the compression chamber of compression mechanism 220 can carry a certain amount of oil, this
A little oil may remain in above partition (i.e. high-pressure side).Due to being located at the downstream of compression mechanism 220, the temperature of oil herein
It is higher with pressure.
Alternatively, drainback passage 274 can also lead to the oil eliminator 290 of the outside of compressor 200 referring to Fig. 5, rather than
Lead to 216 top of partition.Specifically, oil eliminator 290 is connected to the downstream of exhaust joint 215, is discharged from exhaust joint 215
Entrained oil is separated in oil eliminator 290 in refrigerant.The oil eliminator 290 also is located at compression mechanism 220
Downstream has also retained the higher lubricating oil of temperature and pressure in oil eliminator 290.
In both optinal plans, drainback passage 274 include oil return pipe 274a and with the concatenated drop of oil return pipe 274a
Splenium 274b.Decompression portion 274 can reduce the pressure of introduced oil, and the oil of high pressure is avoided to be directly entered the feelings of the second oil sump 217b
To the impact of the second oil sump 217b under condition, and compression efficiency caused by leaking due to pressure by drainback passage 274 is avoided to drop
It is low.Decompression portion 274b is, for example, capillary, but can also use other structures that can reduce pressure, such as valve.
According to the embodiment, 274 class of drainback passage with compressor 200 according to first embodiment also can be realized
As effect, that is, the less high temperature oil of contained refrigeration dose is backed into the second oil sump 217b, with from the first oil sump 217a into
The low-temperature oil for entering the second oil sump 217b is mixed and is lubricated.
Optionally, as shown in fig. 6, oil return pipe 274a can circumferentially be wound on driving mechanism 240 (such as stator 242)
Several circles, with the heating of further driven-mechanism 240, so that further decreasing refrigeration dose contained in oil (it is dilute to reduce oil
Release degree).It should be appreciated that the mode that oil return pipe is wound in driving mechanism also can be applied to first embodiment of the invention.
The compressor 300 that third embodiment according to the present invention is described below with reference to Fig. 7, other than drainback passage,
Compressor 300 with it is essentially identical according to the compressor 100 of embodiment, therefore use with 3 beginning corresponding appended drawing reference
It refers to corresponding element, and will not be repeated again.Exhaust pipe is not shown in Fig. 7, but it is to be understood that can also set
Set the exhaust pipe similar with the exhaust pipe 180 in Fig. 2 and Fig. 3.
In the compressor 300 according to the embodiment, hermetically it is fixed in the outside of compressor housing 310 substantially round
The pipe 392 of tubular, to form crustless sandwich portion 374a, crustless sandwich portion 374a between shell 310 and cylindrical tube 392
A part as drainback passage 374.Drainback passage 374 includes: crustless sandwich portion 374a as a result,；First oil return pipe portion 374b,
High temperature grease in recess portion 352 is passed through shell 310 and is introduced into crustless sandwich portion 374a by the first oil return pipe portion 374b；Second
Lubricating oil in crustless sandwich portion 374a is passed through shell 310 and is introduced into second by oil return pipe portion 374c, the second oil return pipe portion 374c
In oil sump 317b.
Since the temperature of driving mechanism 340 is higher, shell 310 together is closely installed at driving mechanism 340
Temperature it is also higher, by be arranged surround compressor housing 310 crustless sandwich portion 374a, can further pass through shell 310
The oil drawn from recess portion 352 is heated, to further decrease oily dilute strength, improves lubricant effect.In addition it is possible to pressing from both sides
A certain amount of oil is retained in layer portion 374a, plays buffer function, so that even if the flow for the oil drawn from recess portion 352 is unstable
It is fixed, also steadily oil can be supplied in the second oil sump 317b.
Although being described by taking the recess portion 352 in top chock 350 as an example in the embodiment, but it is to be understood that
As long as crustless sandwich portion can be introduced the oil of high temperature position, such as can be combined with the above second embodiment, that is,
First oil return pipe portion 374b can connect to the recess portion of 316 top of partition, or be connected to the oil eliminator outside compressor.
Above first to compressor described in third embodiment be low-pressure side formula compressor, i.e., driving mechanism be arranged
In the compressor of low-pressure side.However, it will be appreciated by those skilled in the art that above each embodiment also can be applied to high-pressure side
Compressor.In high side compressors, refrigerant contained in the lubricating oil after each moving component and stator heating
Amount it is less, therefore by the way that the lubricating oil of high temperature position to be introduced into the second oil sump being separated out and recycle, also can
Oily dilute strength is reduced by similar principle.
In addition, though be mainly described by taking screw compressor as an example above, but theory of the invention is not limited to whirlpool
Compressor is revolved, but the other kinds of compressor including rotary shaft, such as screw compressor, rotator type can also be applied to
Compressor etc., and any kind of rotating machinery including rotary shaft and oil sump.As four embodiment of the invention, below
A kind of rotor-type compressor 400 will be described in conjunction with Fig. 8.
Rotor-type compressor 400 includes shell 410, and air inlet pipe 404,406 and exhaust pipe are provided on shell 410
412.Compression mechanism 420 is accommodated in shell 410 and the driving mechanism of compression mechanism 420 is driven via rotary shaft 430
440 (such as motors).The compression mechanism 420 is rotor-type compressor structure, for example including two compression chambers.Rotary shaft 430 is being compressed
The upper side and lower side of mechanism 420 is supported by top chock 450 and step 454 respectively.In the work of rotor-type compressor 400
In the process, gaseous refrigerant enters via air inlet pipe 404 and 406 and presses after the gas-liquid separator 402 outside compressor 400
The shell 410 of contracting machine 400, then, refrigerant is pressurized to the state of high temperature and pressure in compression mechanism 420, and via exhaust
Pipe 412 leaves compressor.
Oil sump 417 is formed in the bottom of compressor housing 410, grease accumulation is in oil sump 417.By the way that separator is arranged
460, oil sump 417 is also divided into the first external oil sump 417a and the second internal oil sump 417b.Separator 460 can have with
The similar structure of separator 160 described in the above first embodiment, and it is fixed on step 454 and compression case
Between the bottom of body 410, and the first oil inlet 470 and the second oil inlet 472 are again provided on separator 460, first
Oil inlet 470 is connected to the first oil sump 417a with the second oil sump 417b, and drainback passage 474 leads to via the second oil inlet 472
Second oil sump 417b.In the present embodiment, drainback passage 474 is in the form of oil return pipe 474a.
The lubricating system of compressor 400 is described below.Axial oil leab 434 is provided in rotary shaft 430, and
And the oil pumping device 439 being connected to the oil in the second oil sump 417b is provided in oil leab 434, so that working as rotary shaft 430
When rotation, oil pumping device 439 pumps up the oil in the second oil sump 417b along oil leab 434.Rotary shaft 430 with it is upper
At the position that bearing block 450 matches, it is provided with the opening 436 being connected to oil leab 434 and around opening 436
Circumferential oil groove 438.The oil guide groove 452 being connected with the Circumferential oil groove 438 of rotary shaft 430 is provided on top chock 450, it should
Oil guide groove 452 is axially and circumferentially extending from the position of Circumferential oil groove 438, that is, substantially twist extends.It lubricates as a result,
Lubricating oil in oil duct 434 can flow out in Circumferential oil groove 438 from opening 436, and with the rotation of rotary shaft 430 and
It flows along oil guide groove 452, is lubricated to generate oil film between rotary shaft 430 and top chock 450.
The upper end of oil return pipe 474a is inserted through top chock 450, and lead to oil guide groove 452 with Circumferential oil groove 438
The opposite one end in position.The lower end of oil return pipe 474a passes through the second oil inlet 472 of separator 460.Oil guide groove as a result,
Second oil sump can be flowed back into along oil return pipe 474a to the lubricating oil after being lubricated between rotary shaft and top chock in 452
In 417b.Due to the friction between rotary shaft 430 and top chock 450, the temperature of the lubricating oil in oil guide groove 452 is very high, because
This, this part oil can reduce the dilute strength of the oil in the second oil sump 417b after returning in the second oil sump 417b, thus
Improve lubricant effect.
Exhaust pipe is not shown in fig. 8, but can also be provided on separator 460 and the row in first embodiment
The similar exhaust pipe of tracheae 180, will not be described in great detail herein.
Although having been combined multiple embodiments describes multiple features of the invention, those skilled in the art's reason
Solution can will be combined in conjunction with feature described in some embodiment with another embodiment in the absence of conflict, this
A little combinations are all fallen within the scope of the present invention.The invention is not limited to the specific embodiment be described in detail and shown here,
It may be effected by one skilled in the art other modifications without departing from the spirit and scope of the present invention.It is all these
Modification is within the scope of the present invention.Moreover, all components described herein can be by structure equivalent in other technologies
Part replaces.
Claims (17)
1. a kind of rotary compressor, comprising:
Shell；
Compression mechanism；
Oil sump stores lubricating oil in the oil sump；
Rotary shaft is provided with the oil leab being connected to the oil sump in the rotary shaft, and the rotary shaft is by upper bearing (metal)
Seat and step bearing；And
Driving mechanism, the driving mechanism drive the compression mechanism via the rotary shaft；
It is characterized in that,
The oil sump includes the first oil sump and the second oil sump, and first oil sump and second oil sump connect via the first oil inlet
Logical, first oil inlet is configured to allow for lubricating oil to be flowed into described the via first oil inlet from first oil sump
In two oil sumps, the oil leab leads to second oil sump, and
The rotary compressor is additionally provided with drainback passage, the course of work of the drainback passage in the rotary compressor
It is middle that the higher temperature lubricating oil of the rotary compressor is introduced into second oil sump, the higher temperature lubricating oil
Temperature is higher than the lubricating oil temperature in first oil sump.
2. rotary compressor according to claim 1, wherein first oil sump and second oil sump are via separation
Part separates, and the separator is provided with first oil inlet and the second oil inlet, and one end of the drainback passage is arranged in institute
It states in the second oil inlet.
3. rotary compressor according to claim 2, wherein the separator is provided with the exhaust of generally vertical arrangement
Pipe, the outlet of the exhaust pipe are higher than the liquid level in first oil sump.
4. rotary compressor according to claim 3, wherein the exhaust pipe includes bending section, and the outlet is located at
The end of the bending section and towards vertically below.
5. rotary compressor according to claim 2, wherein the separator has and above opens in substantially hull shape
Mouth and under shed, the upper opening is fixed on the step, and the under shed is pressed against the bottom surface of the shell.
6. rotary compressor according to claim 2, wherein the separator is in general toroidal plate, and described
The radially inward edge of separator is fixed on the step, and radially outward edge is fixed to the shell.
7. rotary compressor according to claim 2, wherein first oil sump is located at the outside of the separator,
Second oil sump is located at the inside of the separator.
8. rotary compressor according to claim 2, wherein the separator is made of heat-barrier material.
9. rotary compressor according to claim 1, wherein the rotary compressor is scroll compressor.
10. rotary compressor according to claim 1, wherein the rotary compressor is low-pressure side formula scroll compression
Contracting machine.
11. rotary compressor according to claim 10, wherein the higher temperature lubricating oil level is in the upper bearing (metal)
At the recess portion of seat, and the drainback passage includes oil return pipe.
12. rotary compressor according to claim 1, wherein the higher temperature lubricating oil level in the rotation
In the connected oil eliminator of the exhaust joint of formula compressor.
13. rotary compressor according to claim 12, wherein the drainback passage include oil return pipe and with described time
The concatenated capillary decompression portion of oil pipe.
14. rotary compressor according to claim 1, wherein the outside of the shell is provided with cylindrical tube, from
And between the shell and the cylindrical tube formed crustless sandwich portion, the drainback passage include the crustless sandwich portion,
The first oil return pipe, setting where the higher temperature lubricating oil is arranged between position and the crustless sandwich portion is in the shell
The second oil return pipe between interlayer body portion and second oil sump.
15. rotary compressor according to claim 1, wherein the rotary compressor is rotor-type compressor.
16. rotary compressor according to claim 15, wherein the higher temperature lubricating oil level is in the upper bearing (metal)
At oil guide groove on the inner wall of seat.
17. a kind of method for improving the lubricant effect in rotary compressor, the rotary compressor includes: shell；Compression
Mechanism；Oil sump stores lubricating oil in the oil sump；Rotary shaft is provided with the profit being connected to the oil sump in the rotary shaft
Grease way, and the rotary shaft is supported by top chock and step；And driving mechanism, the driving mechanism is via institute
It states rotary shaft and drives the compression mechanism,
It is characterized in that, which comprises
The oil sump is divided into the first oil sump and the second oil sump, so that first oil sump and second oil sump are via first
Oil inlet connection, first oil inlet are configured to allow for lubricating oil to flow into from first oil sump via first oil inlet
Into second oil sump, the oil leab leads to second oil sump；And
Drainback passage, the course of work of the drainback passage in the rotary compressor are set in the rotary compressor
It is middle that the internal or external higher temperature lubricating oil of the rotary compressor is introduced into second oil sump, it is described higher
The temperature of temperature lubricating oil is higher than the lubricating oil temperature in first oil sump.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510670523.1A CN106567833B (en) | 2015-10-13 | 2015-10-13 | Rotary compressor and method for improving lubricating effect thereof |
| PCT/CN2016/099449 WO2017063480A1 (en) | 2015-10-13 | 2016-09-20 | Rotary compressor and method thereof for enhancing lubricating effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510670523.1A CN106567833B (en) | 2015-10-13 | 2015-10-13 | Rotary compressor and method for improving lubricating effect thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106567833A CN106567833A (en) | 2017-04-19 |
| CN106567833B true CN106567833B (en) | 2019-01-29 |
Family
ID=58508581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510670523.1A Active CN106567833B (en) | 2015-10-13 | 2015-10-13 | Rotary compressor and method for improving lubricating effect thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106567833B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107747830A (en) * | 2017-10-20 | 2018-03-02 | 珠海格力节能环保制冷技术研究中心有限公司 | Oil balancing system, coolant circulating system and air-conditioning |
| CN112483429A (en) | 2019-09-12 | 2021-03-12 | 开利公司 | Centrifugal compressor and refrigeration device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041026A (en) * | 1988-09-16 | 1990-04-04 | 特库姆塞制品公司 | Foreign particles trap for compressor |
| CN1181128A (en) * | 1995-04-07 | 1998-05-06 | 美国标准公司 | Gas flow and lumbrication of scrool compressor |
| CN102200126A (en) * | 2011-06-24 | 2011-09-28 | 大连三洋压缩机有限公司 | Horizontal-type vortex compressor |
| CN205064281U (en) * | 2015-10-13 | 2016-03-02 | 艾默生环境优化技术(苏州)有限公司 | Rotary compressor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1037870A (en) * | 1996-07-25 | 1998-02-13 | Mitsubishi Electric Corp | Scroll compressor |
| JP2012057595A (en) * | 2010-09-13 | 2012-03-22 | Daikin Industries Ltd | Compressor and refrigeration apparatus |
-
2015
- 2015-10-13 CN CN201510670523.1A patent/CN106567833B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041026A (en) * | 1988-09-16 | 1990-04-04 | 特库姆塞制品公司 | Foreign particles trap for compressor |
| CN1181128A (en) * | 1995-04-07 | 1998-05-06 | 美国标准公司 | Gas flow and lumbrication of scrool compressor |
| CN102200126A (en) * | 2011-06-24 | 2011-09-28 | 大连三洋压缩机有限公司 | Horizontal-type vortex compressor |
| CN205064281U (en) * | 2015-10-13 | 2016-03-02 | 艾默生环境优化技术(苏州)有限公司 | Rotary compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106567833A (en) | 2017-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8834139B2 (en) | Lubrication of a scroll compressor | |
| US20150030487A1 (en) | Compressor | |
| US20140140868A1 (en) | Scroll compressor with oil-cooled motor | |
| EP2940302B1 (en) | Scroll compressor | |
| US20140017108A1 (en) | Scroll compressor | |
| KR101971819B1 (en) | Scroll compressor | |
| JP5014346B2 (en) | Expander-integrated compressor and refrigeration cycle apparatus including the same | |
| EP2050966A2 (en) | Compressor | |
| EP3382205A1 (en) | Compressor | |
| US7731486B2 (en) | Compressor with dual pathways for returning lubricating oil | |
| EP2339180B1 (en) | Multiple-stage compressor | |
| CN205064281U (en) | Rotary compressor | |
| CN106567833B (en) | Rotary compressor and method for improving lubricating effect thereof | |
| US8118563B2 (en) | Tandem compressor system and method | |
| JP2007085297A (en) | Scroll compressor | |
| CN106382227A (en) | Multi-stage compression type rotary compressor and refrigerating circulating device provided with same | |
| CN107781160A (en) | Scroll compressor having a plurality of scroll members | |
| EP3779195A1 (en) | Scroll compressor | |
| US20220042509A1 (en) | Compressor oil management system | |
| WO2017063480A1 (en) | Rotary compressor and method thereof for enhancing lubricating effect | |
| US20220412352A1 (en) | Compressor | |
| CN207195173U (en) | Compressor with a compressor housing having a plurality of compressor blades | |
| JP2009127440A (en) | Scroll compressor | |
| JP2020007982A (en) | Two-stage screw fluid machine | |
| EP3988786B1 (en) | Compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |