CN202228355U - Oil return structure for scroll compressor - Google Patents

Oil return structure for scroll compressor Download PDF

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Publication number
CN202228355U
CN202228355U CN2011201344253U CN201120134425U CN202228355U CN 202228355 U CN202228355 U CN 202228355U CN 2011201344253 U CN2011201344253 U CN 2011201344253U CN 201120134425 U CN201120134425 U CN 201120134425U CN 202228355 U CN202228355 U CN 202228355U
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CN
China
Prior art keywords
scroll
oil
compressor
scroll plate
fuel feeding
Prior art date
Application number
CN2011201344253U
Other languages
Chinese (zh)
Inventor
罗岳华
Original Assignee
湖南华强电气有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 湖南华强电气有限公司 filed Critical 湖南华强电气有限公司
Priority to CN2011201344253U priority Critical patent/CN202228355U/en
Application granted granted Critical
Publication of CN202228355U publication Critical patent/CN202228355U/en

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Abstract

The utility model discloses an oil return structure for a scroll compressor. The oil return structure comprises a casing, a machine frame, a dynamic scroll plate, a static scroll plate, a crank shaft and an oil return pipe, wherein a cavity among the inner cavity of the machine frame, the dynamic scroll plate, the static scroll plate and the crank shaft is taken as a medium pressure oil storage cavity; the dynamic scroll plate consists of a damping oil supply channel, the oil inlet of the damping lubricating oil supply channel is communicated with the medium pressure oil storage cavity, and the oil outlet of the damping lubricating oil supply channel is communicated with the tooth socket of the scroll wrap of the dynamic scroll plate; the oil return pipe is communicated with the medium pressure lubricating oil storage cavity; lubricating oil separated out by an air-conditioning system oil and gas separator firstly flows into the medium pressure oil storage cavity via the oil return pipe, and then adjustably flows into the tooth socket of the dynamic scroll plate via the damping oil supply channel of the dynamic scroll plate to lubricate the dynamic scroll plate and the static scroll plate, thus a great amount of lubricating oil can be prevented from flowing into the scroll working cavity of the compressor, and further the volumetric efficiency and the refrigerating capacity of the compressor are improved.

Description

A kind of oil return structure of scroll compressor
[technical field]
The utility model relates to the air-conditioning scroll compressor, relates in particular to a kind of oil return structure of scroll compressor.
[background technique]
Scroll compressor belongs to positive displacement compressor for compressing tool, and compression member is made up of moving scroll and fixed scroll.When the air-conditioning scroll compressor is worked; The air-conditioning scroll compressor compresses the back to refrigerant and directly discharges through the exhaust port of fixed scroll; Refrigerant will inevitably have some lubricant oil in discharge process; The refrigerant of discharging and the ratio of lubricant oil are uncontrollable, add a deaerator in the air-conditioning system of generally being everlasting and carry out Oil-gas Separation.The lubricant oil of separating from deaerator also will flow back into the inner recycling of scroll compressor through return tube, lubricated moving scroll and fixed scroll; Traditional oil return mode is through the pressure difference between deaerator and the compressor air suction mouth; Carry the oil of deaerator the intakeport of scroll compressor to get into the air aspiration cavity of compressor again with capillary tube; This oil return mode; The lubricant oil that gets into the scroll compressor active chamber often surpasses the lubricated demand of dynamic and static scroll, has reduced the volumetric efficiency and the refrigerating capacity of compressor significantly.
[summary of the invention]
The technical problem that the utility model will solve provides the oil return structure of the higher scroll compressor of a kind of volumetric efficiency.
In order to solve the problems of the technologies described above; The technological scheme that the utility model adopts is; A kind of oil return structure of scroll compressor comprises casing, frame, moving scroll, fixed scroll, bent axle and return tube; During constituting, cavity between the inner chamber of said frame, moving scroll, fixed scroll and the bent axle presses shoe cream room; Described moving scroll comprises damping fuel feeding road, presses shoe cream room during the filler opening in said damping fuel feeding road is logical described, the teeth groove of the wrap of the logical moving scroll of the oil outlet in damping fuel feeding road; Press shoe cream room during described return tube is logical described.
The oil return structure of above-described scroll compressor, the oil outlet in said damping fuel feeding road is near the inner edge of moving scroll wrap.
The oil return structure of above-described scroll compressor, the folded central angle in the oil outlet in said damping fuel feeding road and moving scroll wrap outer end is greater than 270 °, less than 360 °.
The oil return structure of above-described scroll compressor, described scroll compressor is a horizontal type scroll compressor, comprises rolling bearing between the endoporus of described said frame and the bent axle.
The lubricant oil that the scroll compressor air-conditioning system deaerator of the utility model is separated is pressed shoe cream room in flowing into through return tube; Damping fuel feeding road through moving scroll abstemiously flows to lubricated moving scroll and fixed scroll in the teeth groove that moves scroll again; Can prevent that a large amount of lubricant oil from getting into the vortex active chamber, thereby improve the volumetric efficiency and the refrigerating capacity of compressor.
[description of drawings]
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is the utility model scroll compressor oil return structure embodiment's a sectional view.
Fig. 2 is the direction of scroll compressor oil return structure embodiment crankshaft crank dorsad during the filler opening in damping fuel feeding road, the structural representation at position, damping fuel feeding road.
Fig. 3 be the direction of scroll compressor oil return structure embodiment crankshaft crank when the filler opening in damping fuel feeding road, the structural representation at position, damping fuel feeding road.
Fig. 4 is the structural drawing of the utility model scroll compressor oil return structure embodiment fixed scroll.
Fig. 5 is the structural drawing of the moving scroll of the utility model scroll compressor oil return structure embodiment.
[embodiment]
To the embodiment 1 of the utility model horizontal type scroll compressor oil return structure shown in Figure 5, horizontal type scroll compressor comprises casing 1, frame 2, moving scroll 3, fixed scroll 4, bent axle 5 and return tube 6 at Fig. 1.Fixed scroll 4 is screwed the front end in frame 2, and the relief opening 401 of fixed scroll 4 central authorities communicates with the inner chamber of casing 1, and this scroll compressor is the hyperbaric chamber compressor.Wrap on moving scroll 3 and the fixed scroll 4 forms the active chamber of scroll compressor.Press shoe cream room A during cavity between the inner chamber of frame 2, moving scroll 3, fixed scroll 4 and the bent axle 5 constitutes, press shoe cream room A during return tube 6 is logical, pressure shoe cream room A the lubricant oil of separating from the oil outer gas separating device flow back into through return tube 6.
In press pressure among the shoe cream room A to the axial force of moving scroll 3 greater than the axial force of compression chamber gas force to moving scroll 3, make scroll 3 be close to fixed scroll 4 automatically.
In the moving scroll 3 damping fuel feeding road 301 is arranged, the filler opening 302 logical middle shoe cream room A that press in damping fuel feeding road, the teeth groove of the wrap of the oil outlet 303 logical moving scroll 3 in damping fuel feeding road.The lubricant oil of separating from deaerator flows into through return tube 6 and presses shoe cream room A described, therefrom presses shoe cream room A abstemiously to get into the teeth groove of the wrap of moving scroll 3 again, lubricated moving scroll 3 and fixed scroll 4.
The front portion of bent axle 5 is bearing in the endoporus of frame 2 through rolling bearing 7; In order to press the pressure of shoe cream room A in keeping; Need the oil resistance device between the endoporus of frame 2 and the bent axle 5, adopt sliding bearing 8 in the present embodiment as the oil resistance device, to improve the sealing degree between bent axle 5 and the frame endoporus.
The oil return pore 201 that communicates with middle pressure shoe cream room A is arranged on the sidewall of frame 2 housings, comprise the annular groove that seal ring 9 is installed in the oil return pore 201, the seal ring 9 between return tube 6 and the frame 2 is installed in the annular groove.Return tube 6 passes the spill port of chassis sidewall 101 and is installed in the seal ring 9 in the oil return pore 201, is inserted in the lubricant oil that refluxes to middle pressure shoe cream room A input in the oil return pore 201.Return tube 6 casings 1 outer part is fixed with casing 1 welding.
Through the sealing surface sealing, along with the rotation of bent axle 5, the sealing surface of moving scroll is done the revolution translation with respect to the sealing surface of fixed scroll 4 in submarginal part for moving scroll and fixed scroll 4.
The filler opening 302 in damping fuel feeding road 301 is positioned on the moving scroll 3 submarginal sealing surfaces.The oil groove that is communicated with middle pressure shoe cream room A is arranged on the fixed scroll 4 submarginal sealing surfaces, and oil groove comprises the groove 402 of annular and the oilhole 403 that is communicated with groove.The sealing surface that fixed scroll 4 exposes is the constituent element of middle pressure shoe cream room A, presses among the shoe cream room A, as the oil inlet passage of oilhole 403 during annular groove 402 partly is exposed to.
As shown in Figure 3, when the direction of the crank throw 501 of bent axle 5 during towards the filler opening 302 in damping fuel feeding road 301, filler opening 302 and oilhole 403 near and be interconnected.At this moment; Middle oilhole 403 of pressing the pressure lubrication oil among the shoe cream room A to be communicated with groove from annular groove 402 entering; Get into damping fuel feeding road 301 from oilhole 403 through filler opening 302 again; Get into damping fuel feeding road 301 and get into the teeth groove of the wrap of scroll 3, lubricated moving scroll 3 and fixed scroll 4 through oil outlet 303.
Along with the rotation of moving scroll 3, when the direction of bent axle 5 crank throws 501 was left the direction of filler opening 302 in damping fuel feeding road 301, filler opening 302 staggered with oilhole 403 gradually, and after this filler opening 302 breaks off with oilhole 403 fully.Shown in Figure 2 is the direction of crank throw 501 of bent axle 5 dorsad during the direction of the filler opening 302 in damping fuel feeding road 301, the situation that filler opening 302 and oilhole 403 separate fully.
Moving 3 every 1 weeks of revolution of scroll; Filler opening 302 is communicated with 1 time with oilhole 403, damping fuel feeding road 301 be intermittently, momently to the active chamber fuel feeding of scroll compressor, can control fuel delivery effectively to the active chamber of scroll compressor; Dynamic and static scroll both can obtain effective lubricating; Can not get into too much lubricant oil again in the active chamber of scroll compressor, improve the volumetric efficiency of scroll compressor effectively, the refrigerating capacity of scroll compressor is improved.
The oil outlet 303 in damping fuel feeding road 301 is near the inner edge of moving scroll 3 wrap 304; As shown in Figure 3; When filler opening 302 and oilhole 403 were interconnected, the outer rim of the wrap 404 of fixed scroll 4 was left the inner edge of moving scroll 3 wrap 304, reserved fuel-displaced passage for the oil outlet 303 in damping fuel feeding road 301; Make lubricant oil get into wrap 404 and revolve between the tooth 304, be lubricated; When the outer rim of wrap 404 during near the inner edge of moving scroll 3 wrap 304; Wrap 404 is with oil outlet 303 sealings in damping fuel feeding road 301; This structure can provide enough lubricating to vortex; Prevent that simultaneously too much lubricant oil from getting into vortex mechanism, bring negative influence for the heat exchange of air-conditioning system.The oil outlet 303 in damping fuel feeding road 301 with moving scroll 3 wrap 304 outer end heads along the pairing central angle of the vortex filament of wrap 304 greater than 270 °, less than 360 °.As shown in Figure 5, in the present embodiment, this angle is 360-25=335 °.Like this, oil outlet 303 is positioned at the position, stage casing of wrap 304, i.e. the middle splenium position of the active chamber of scroll compressor, and during fuel feeding, air aspiration cavity seals the oil outlet in damping fuel feeding road 301, prevents the fuel-displaced air aspiration cavity that flows in damping fuel feeding road 301 in teeth groove; Simultaneously, the oil outlet in damping fuel feeding road 301 departs from the high pressure position of the heart portion of compressing mechanism wrap, prevents to press shoe cream room in the pressurized gas refluence entering in the compression chamber, makes the lubrication failure of vortex mechanism.

Claims (4)

1. the oil return structure of a scroll compressor; Comprise casing, frame, moving scroll, fixed scroll, bent axle and return tube is characterized in that; Cavity between the inner chamber of said frame, moving scroll, fixed scroll and the bent axle constitutes the middle pressure shoe cream room of sealing; Described moving scroll comprises damping fuel feeding road, presses shoe cream room during the filler opening in said damping fuel feeding road is logical described, the teeth groove of the wrap of the logical moving scroll of the oil outlet in damping fuel feeding road; Press shoe cream room during described return tube is logical described.
2. the oil return structure of scroll compressor according to claim 1 is characterized in that, the oil outlet in said damping fuel feeding road is near the inner edge of moving scroll wrap.
3. the oil return structure of scroll compressor according to claim 1 is characterized in that, the folded central angle in the oil outlet in said damping fuel feeding road and moving scroll wrap outer end is greater than 270 °, less than 360 °.
4. according to the oil return structure of the described scroll compressor of arbitrary claim in the claim 1 to 8, it is characterized in that described scroll compressor is a horizontal type scroll compressor, comprise rolling bearing between the endoporus of described said frame and the bent axle.
CN2011201344253U 2011-04-30 2011-04-30 Oil return structure for scroll compressor CN202228355U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201344253U CN202228355U (en) 2011-04-30 2011-04-30 Oil return structure for scroll compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201344253U CN202228355U (en) 2011-04-30 2011-04-30 Oil return structure for scroll compressor

Related Child Applications (3)

Application Number Title Priority Date Filing Date
CN2011202984558U Division CN202250845U (en) 2011-04-30 2011-04-30 Oil returning structure of vortex compressor
CN2011202981121U Division CN202250844U (en) 2011-04-30 2011-04-30 Oil return structure of scroll compressor
CN2011202997168U Division CN202228357U (en) 2011-04-30 2011-04-30 Oil return structure for scroll compressor

Publications (1)

Publication Number Publication Date
CN202228355U true CN202228355U (en) 2012-05-23

Family

ID=46078942

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011201344253U CN202228355U (en) 2011-04-30 2011-04-30 Oil return structure for scroll compressor

Country Status (1)

Country Link
CN (1) CN202228355U (en)

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
PLDC Enforcement, change and cancellation of contracts on pledge of patent right or utility model
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Oil returning structure of vortex compressor

Effective date of registration: 20130805

Granted publication date: 20120523

Pledgee: Pudong Development Bank of Shanghai, Limited by Share Ltd, Changsha branch

Pledgor: Hunan Vaqoung Electric Co. Ltd.

Registration number: 2011990000240

PLDC Enforcement, change and cancellation of contracts on pledge of patent right or utility model
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20150626

Granted publication date: 20120523

Pledgee: Pudong Development Bank of Shanghai, Limited by Share Ltd, Changsha branch

Pledgor: Hunan Vaqoung Electric Co. Ltd.

Registration number: 2011990000240