CN202417972U - Centrifugal compressor with isolation structure - Google Patents
Centrifugal compressor with isolation structure Download PDFInfo
- Publication number
- CN202417972U CN202417972U CN2011203650925U CN201120365092U CN202417972U CN 202417972 U CN202417972 U CN 202417972U CN 2011203650925 U CN2011203650925 U CN 2011203650925U CN 201120365092 U CN201120365092 U CN 201120365092U CN 202417972 U CN202417972 U CN 202417972U
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- screw thread
- oil
- isolation
- centrifugal compressor
- motor
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Abstract
The utility model provides a centrifugal compressor with an isolation structure, which comprises a motor cavity, a motor tail end oil return cavity, a rotor body and a rotor rotation shaft. The rotor body is arranged in the motor cavity; the rotor rotation shaft extends into the motor tail end oil return cavity along the axial direction of the rotor body and is provided with an isolation thread and an oil throwing slot; the oil throwing slot is connected with the isolation thread; the periphery of the isolation thread is sleeved by an isolation sealing sleeve ring; and the oil throwing slot is located in the motor tail end oil return cavity. The rotor rotation shaft of the centrifugal compressor with the isolation structure is provided with the isolation thread and the oil throwing slot, the periphery of the isolation thread is sleeved by the isolation sealing sleeve ring, and the motor cavity and the motor tail end oil return cavity are isolated by the isolation sealing sleeve ring. The centrifugal compressor with the isolation structure adopts the isolation thread, the oil throwing slot and the isolation sealing sleeve ring to realize the isolation of the refrigerant gas and the lubricating oil between the motor cavity and the motor tail end oil return cavity, has a good isolation effect and lower cost and is easy to implement.
Description
Technical field
The utility model relates to the air conditioner refrigerating technical field, especially, relates to a kind of centrifugal compressor with isolation structure.
Background technique
For centrifugal compressor, oil-way system and air-channel system should be isolated fully, but but the two-way system are infiltrated each other at the two ends at the Bearing Installation place of the cooling motor of centrifugal compressor.In case the lubricant oil of lubricating bearings gets into the motor cavity the inside, lubricant oil might get into the vaporizer the inside through muffler again, thereby influences refrigeration, even might make compressor band liquid; If the cold media air that is used for the cooling motor staor winding gets into the fuel tank of lubricant oil; Then can cause the interior temperature of fuel tank of lubricant oil on the low side; Melting the lubricating oil viscosity that cold media air is arranged will reduce, and lubrication effect will reduce greatly, may cause bearing to be burnt out.
At present; The cold media air that centrifugal compressor is commonly used, the isolation method of lubricant oil basically all adopt single form; Like sealing gland (cooperation labyrinth seal), mechanical seal, spiral seal, get rid of forms such as oil groove, but these isolation methods all have certain stressing usually, lay particular emphasis on oil resistance more; Can not realize simultaneously that cold media air and lubricant oil isolates simultaneously, isolation effect is very unobvious.For example, sealing gland (cooperation labyrinth seal) temporarily does not form under the situation of pressure reduction in that rotating ratio is low, what does not have basically act on, and still is easy to leakage of oil in too much just beginning oil mass; Mechanical seal comparatively speaking good airproof performance a bit, but the structure more complicated, cost is than higher; Single spiral seal can not stop the entering of oil fully, also easily the gas of cooling motor is pressed into together the fuel tank the inside of lubricant oil, causes the oil temperature on the low side, reduces the lubrication effect of lubricant oil; It is better to get rid of oil groove effect under the less situation of oil mass, but effect is not very desirable when oil mass is many.
Because the defective of above-mentioned isolation method causes the cooling effectiveness of centrifugal compressor to reduce, and has increased maintenance cost.Therefore, be necessary to provide a kind of cooled gas of the Bearing Installation place that can realize cooling motor effectively and the centrifugal compressor of the effective isolation between the bearing oil.
The model utility content
The utility model purpose is to provide a kind of centrifugal compressor with isolation structure, with the Bearing Installation place that solves the cooling motor that has centrifugal compressor now cooled gas and the interpenetrative technical problem of bearing oil takes place easily.
For realizing above-mentioned purpose; The utility model provides a kind of centrifugal compressor with isolation structure; It is characterized in that; Comprise: motor cavity, motor tail end oil back chamber, be positioned at the rotor body of motor cavity and along the rotor shaft that axially extend into motor tail end oil back chamber of rotor body, offer on the rotor shaft isolate screw thread and with isolate the oil groove that gets rid of that screw thread links to each other, the periphery of isolation screw thread is arranged with the isolating seal collar; The isolating seal collar separates motor cavity and motor tail end oil back chamber, gets rid of oil groove and is positioned at motor tail end oil back chamber.
Further, isolate screw thread and comprise, and the Hand of spiral of trapping screw thread and oil removal screw thread is opposite near the trapping screw thread of motor cavity one end with near the oil removal screw thread of motor tail end oil back chamber one end.
Further, be provided with screw thread between trapping screw thread and the oil removal screw thread and cut off the district.
Further, screw thread cuts off the district and is provided with the radially ring platform of protrusion, the outer wall of ring platform and the through-hole wall Spielpassung of the isolating seal collar.
Further, the matching gap between the through-hole wall of outer wall and the isolating seal collar of ring platform is 0.12 to 0.15mm.
Further, the axial length of the overlay area of trapping screw thread is less than the axial length of the overlay area of oil removal screw thread.
Further, isolating matching gap between the inwall of through hole of external diameter and the isolating seal collar of screw thread is 0.12 to 0.15mm.
The quantity of further, getting rid of oil groove is one or more.
Further, the quantity of getting rid of oil groove is three, and three are got rid of oil groove and conjointly laterally arrange in order.
Further, each width that gets rid of oil groove is 4.5mm to 5.5mm, and the adjacent distance of getting rid of between the oil groove is 0.5mm to 1.5mm, and getting rid of and being provided with the inclination angle in the oil groove is 45 ° to 60 ° plane of inclination.
The utlity model has following beneficial effect:
Offered the isolation screw thread on the rotor shaft of the centrifugal compressor that the utility model provides simultaneously and got rid of oil groove with isolation structure; And at the sheathed isolating seal collar of periphery of isolating screw thread, and utilize the isolating seal collar that motor cavity and motor tail end oil back chamber are separated.This has adopted and isolates screw thread, gets rid of oil groove and the isolating seal collar and realize cold media air and the isolation of lubricant oil between motor cavity and the motor tail end oil back chamber simultaneously for centrifugal compressor that the utility model provides; Isolation effect is good; Be easy to realize; And with low cost, reduced the cost of centrifugal compressor.
Except top described purpose, feature and advantage, the utility model also has other purpose, feature and advantage.To do further detailed explanation to the utility model with reference to figure below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the schematic representation of isolation structure of the centrifugal compressor of the utility model preferred embodiment;
Fig. 2 is the structure for amplifying schematic representation of I portion among Fig. 1; And
Fig. 3 is the partial structurtes schematic representation that gets rid of oil groove of the utility model preferred embodiment.
Embodiment
Embodiment to the utility model is elaborated below in conjunction with accompanying drawing, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As depicted in figs. 1 and 2; The utility model provides a kind of centrifugal compressor with isolation structure; Comprise: be positioned at the rotor body 11 of motor cavity A and along the rotor shaft 13 of the motor tail end oil back chamber B that axially extend into of rotor body 11; Offer on the rotor shaft 13 isolate screw thread 30 and with isolate that screw thread 30 links to each other get rid of oil groove 50, wherein, the periphery of isolation screw thread 30 is arranged with the isolating seal collar 20; This isolating seal collar 20 separates motor cavity A and motor tail end oil back chamber B, gets rid of oil groove 50 and is positioned at motor tail end oil back chamber B.The combining form of utilize to isolate screw thread, getting rid of the oil groove and the isolating seal collar 20 realizes the isolation of cooled gas and lubricant oil simultaneously; Isolation effect is good; Simple in structure, only need on rotor shaft, to offer screw thread simultaneously and get rid of oil groove to get final product, processing cost is lower; And because isolation effect is good, the life-span of having improved compressor.In fact, motor cavity A is formed by electric machine casing 60 and back end cover for motor 70, and motor tail end oil back chamber B stretches out the space and the isolating seal collar 20 that form by back end cover for motor 70 to electric machine casing 60 inboards and forms.
Isolating screw thread 30 comprises near the trapping screw thread 31 of motor cavity A one end with near the oil removal screw thread 32 of motor tail end oil back chamber B one end; And trapping screw thread 31 is opposite with the Hand of spiral of oil removal screw thread 32; Isolate screw thread and be adopted as the bidirectional screw sealing, lubricant oil and refrigerant are isolated fully.For example; See from the tail end of rotor shaft 13; Trapping screw thread 31 adopts the worm structure of rotation counterclockwise; In motor operation course, trapping screw thread 31 can stop the cooled gas of cooling motor to get among the motor tail end oil back chamber B through the slit between the isolating seal collar 20 and the rotor shaft 13, and then is dissolved in the lubricant oil.Oil removal screw thread 32 adopts dextrorotation, and the slit that in motor operation course, can stop lubricant oil to pass through between the isolating seal collar 20 and the rotor shaft 13 gets into motor cavity A the inside.Because trapping screw thread 31 near motor cavity A one end, is to be used for choke, therefore need not increases and get rid of oil groove.Such Hand of spiral opposite configuration; Make some gases through trapping screw thread 31 intercepted because of the acting in opposition of oil removal screw thread 32; In like manner, some oil through oil removal screw thread 32 are intercepted because of the acting in opposition of trapping screw thread 31, thereby play better sealing effect.
Be provided with screw thread between trapping screw thread 31 and the oil removal screw thread 32 and cut off the district.Can not be communicated with between the spiral seal of two ends; Otherwise when emergency shutdown; In case the pressure of motor cavity A and motor tail end oil back chamber B differs bigger, then be easy to make the gas in the trapping screw thread 31 to get into motor tail end oil back chamber B or make the oil in the oil removal screw thread 32 get into motor cavity A.
When between motor cavity A and motor tail end oil back chamber B, having big pressure reduction; Reduce the mutual infiltration of air-channel system and oil-way system as much as possible; Screw thread cuts off the district and is provided with the radially ring platform 15 of protrusion, and the slit between the outer wall of ring platform 15 and the through-hole wall of the said isolating seal collar 20 is 0.12 to 0.15mm.
Because of the trapping screw thread 31 near motor cavity A is used for choke; Oil removal screw thread 32 near the bearing lubrication device at motor bearings place is used for oil resistance; In the actual motion, because oil ratio gas permeate more easily, so can the axial length of the overlay area of the trapping screw thread 31 of choke be lacked slightly; The overlay area of the oil removal screw thread 32 of oil resistance longer slightly along the axial length can be realized better sealing effect like this on the axle of equal length.
Because of the monolateral gap of rotor shaft 13 and bearing 40 about 0.7～0.10mm; So the gap between the isolation screw thread 30 and the isolating seal collar 20 is monolateral should be about 0.12～0.15mm; Otherwise excesssive gap then amount of leakage is bigger, and the gap is too small then can interfere with rotor shaft 13.
The quantity of getting rid of oil groove 50 can be one, also can be for a plurality of.As a kind of optional mode of execution, the quantity of getting rid of oil groove 50 is three, and three are got rid of oil groove 50 and conjointly laterally arrange in order.Be provided with three sections near the outlet port of the oil removal spiral 32 of motor tail end oil back chamber B one end and get rid of oil groove 50; Two kinds of oil resistance modes cooperate and can the oil that the slit that cut off the district through the isolating seal collar 20 and trapping screw thread 31 and screw thread is infiltrated be got rid of away; Simultaneously; Getting rid of oil groove near two sections of bearing 40 1 ends can get rid of away the oil on the rotor shaft 13 in advance, alleviates the oil mass that enters between the oil removal screw thread 32 and the isolating seal collar 20, plays the effect of isolation lubricating oil further.
As shown in Figure 3, as a kind of optional mode of execution, each width that gets rid of oil groove 50 can be 4.5mm to 5.5mm, and the adjacent distance of getting rid of between the oil groove 50 can be 0.5mm to 1.5mm.
Saidly get rid of that to be provided with the inclination angle in the oil groove 50 be 45 ° to 60 ° plane of inclination, utilize this plane of inclination effectively oil to be thrown away.Rotor shaft 13 is positioned at an end of motor tail end oil back chamber, in case be stained with oil above the rotor shaft 13, through oil removal screw thread 32 oil is thrown away, and gets into and gets rid of oil groove 50, in operation process, through centrifugal force oil is thrown away along 45 ° of inclined-planes that get rid of in the oil groove 50.
In the rotor operation process, the cooled gas in the motor cavity A is hindered by trapping screw thread 31 when wanting to get among the motor tail end oil back chamber B through the isolating seal collar 20 and isolation screw thread 30, and rotating speed is high more, and the choke effect is good more; In like manner, rotating speed is high more, and the oil resistance effect of oil removal screw thread is good more.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (10)
1. centrifugal compressor with isolation structure; It is characterized in that; Comprise: motor cavity (A), motor tail end oil back chamber (B), be positioned at said motor cavity (A) rotor body (11) and along said rotor body (11) the rotor shaft (13) that axially extend into motor tail end oil back chamber (B); Offer on the said rotor shaft (13) isolate screw thread (30) and link to each other with said isolation screw thread (30) get rid of oil groove (50); The periphery of said isolation screw thread (30) is arranged with the isolating seal collar (20); The said isolating seal collar (20) separates said motor cavity (A) and said motor tail end oil back chamber (B), and the said oil groove (50) that gets rid of is positioned at said motor tail end oil back chamber (B).
2. the centrifugal compressor with isolation structure according to claim 1; It is characterized in that; Said isolation screw thread (30) comprises near the trapping screw thread (31) of said motor cavity (A) end with near the oil removal screw thread (32) of said motor tail end oil back chamber (B) end, and said trapping screw thread (31) is opposite with the Hand of spiral of said oil removal screw thread (32).
3. the centrifugal compressor with isolation structure according to claim 2 is characterized in that, is provided with screw thread between said trapping screw thread (31) and the said oil removal screw thread (32) and cuts off the district.
4. the centrifugal compressor with isolation structure according to claim 3 is characterized in that, said screw thread cuts off the district and is provided with the radially ring platform (15) of protrusion, the through-hole wall Spielpassung of the outer wall of said ring platform (15) and the said isolating seal collar (20).
5. the centrifugal compressor with isolation structure according to claim 4 is characterized in that, the matching gap between the through-hole wall of the outer wall of said ring platform (15) and the said isolating seal collar (20) is 0.12 to 0.15mm.
6. the centrifugal compressor with isolation structure according to claim 2 is characterized in that, the axial length of the overlay area of said trapping screw thread (31) is less than the axial length of the overlay area of said oil removal screw thread (32).
7. the centrifugal compressor with isolation structure according to claim 1 is characterized in that, the matching gap between the inwall of the through hole of the external diameter of said isolation screw thread (30) and the said isolating seal collar (20) is 0.12 to 0.15mm.
8. according to each described centrifugal compressor in the claim 1 to 7, it is characterized in that said quantity of getting rid of oil groove (50) is one or more with isolation structure.
9. the centrifugal compressor with isolation structure according to claim 8 is characterized in that, said quantity of getting rid of oil groove (50) is three, and three said oil grooves (50) that get rid of conjointly laterally arrange in order.
10. the centrifugal compressor with isolation structure according to claim 9; It is characterized in that; Each said width that gets rid of oil groove (50) is 4.5mm to 5.5mm; Adjacent said distance of getting rid of between the oil groove (50) is 0.5mm to 1.5mm, saidly gets rid of that to be provided with the inclination angle in the oil groove (50) be 45 ° to 60 ° plane of inclination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203650925U CN202417972U (en) | 2011-09-28 | 2011-09-28 | Centrifugal compressor with isolation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203650925U CN202417972U (en) | 2011-09-28 | 2011-09-28 | Centrifugal compressor with isolation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202417972U true CN202417972U (en) | 2012-09-05 |
Family
ID=46742743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203650925U Expired - Lifetime CN202417972U (en) | 2011-09-28 | 2011-09-28 | Centrifugal compressor with isolation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202417972U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032347A (en) * | 2011-09-28 | 2013-04-10 | 珠海格力电器股份有限公司 | Centrifugal compressor with insulation structure |
| CN103133064A (en) * | 2013-03-15 | 2013-06-05 | 联优机械(常熟)有限公司 | Self-sealing-function connecting shaft structure of expansion turbine external work output connection device |
-
2011
- 2011-09-28 CN CN2011203650925U patent/CN202417972U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032347A (en) * | 2011-09-28 | 2013-04-10 | 珠海格力电器股份有限公司 | Centrifugal compressor with insulation structure |
| CN103032347B (en) * | 2011-09-28 | 2015-08-19 | 珠海格力电器股份有限公司 | There is the centrifugal compressor of isolation structure |
| CN103133064A (en) * | 2013-03-15 | 2013-06-05 | 联优机械(常熟)有限公司 | Self-sealing-function connecting shaft structure of expansion turbine external work output connection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |