CN202579335U - Centrifugal compressor and motor rear end cover thereof - Google Patents
Centrifugal compressor and motor rear end cover thereof Download PDFInfo
- Publication number
- CN202579335U CN202579335U CN 201220221864 CN201220221864U CN202579335U CN 202579335 U CN202579335 U CN 202579335U CN 201220221864 CN201220221864 CN 201220221864 CN 201220221864 U CN201220221864 U CN 201220221864U CN 202579335 U CN202579335 U CN 202579335U
- Authority
- CN
- China
- Prior art keywords
- centrifugal compressor
- rear end
- end cover
- housing
- motor
- 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.)
- Expired - Lifetime
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- 239000006071 cream Substances 0.000 claims description 21
- 239000002828 fuel tank Substances 0.000 claims description 14
- 239000000446 fuel Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 13
- 210000004907 gland Anatomy 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 56
- 230000003139 buffering effect Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 239000010687 lubricating oil Substances 0.000 abstract description 2
- 239000000314 lubricant Substances 0.000 description 21
- 239000006200 vaporizer Substances 0.000 description 12
- 239000003507 refrigerant Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 3
- 238000010977 unit operation Methods 0.000 description 2
- 229910000897 Babbitt (metal) Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a centrifugal compressor and motor rear end cap thereof. According to the utility model discloses a centrifugal compressor motor rear end cap has the oil storage chamber and the oil gallery that switches on with the oil storage chamber, and the rear end cap includes the flat plate portion with compressor housing cooperation, and one side of flat plate portion has the casing portion of evagination, forms the oil storage chamber between casing portion and the flat plate portion; the side of the flat plate part opposite to the shell part is provided with a shaft hole matched with a main shaft of a motor of the centrifugal compressor. According to the utility model discloses a centrifugal compressor and motor rear end cap thereof, one side of rear end cap has the casing portion of evagination to increased the volume in the inside oil storage chamber of casing portion, the rear end cap provides more oil storage spaces under using the same material, and when the system operation is unstable, certain buffering can be formed in bigger oil storage space, thereby prevent that the oil pressure from increasing too greatly in the short time and leading to in a large amount of entering evaporimeters of lubricating oil.
Description
Technical field
The utility model relates to the centrifugal compressor field, in particular to a kind of centrifugal compressor and back end cover for motor thereof.
Background technique
The rear end cover shoe cream room volume of conventional centrifugal compressor motor is less; If because the instability of unit operation environment causes the tank pressure increase fuel delivery increase to occur and oil return is unusual; Can cause oil mass increase in the back end cover for motor shoe cream room, thereby the pressure in the cavity is increased.If the rear end oil pressure is greater than the motor cavity internal pressure; Lubricant oil will occur and enter into the motor inside cavity through labyrinth seal along electric machine main shaft; Mix with the refrigerant of cooling motor; Muffler through motor enters in the vaporizer then, because lubricant oil is lighter than liquid refrigerant, lubricant oil floats over the top of liquid refrigerant in vaporizer.For existing centrifugal unit; Through the refrigerant purifying plant; Oil in the vaporizer is recovered in the fuel tank, and the refrigerant purifying plant is taken from from the next low-temperature mixed liquid of vaporizer liquid level, through the high temperature refrigerant thermal source heating that comes from condenser; Make the refrigeration agent evaporation in the mixed solution, get back to the centrifugal compressor suction port and go.The lubricant oil that can not evaporate then gets back to fuel tank, thereby reached the purpose of separation, purification.But existing controlling method is, (ordinary circumstance is 24 hours) once reclaims at set intervals, and under the normal condition, this method can satisfy the proper functioning of unit.If because system exception causes a large amount of lubricant oil to enter into vaporizer; And the time of purifying of refrigerant does not next time also arrive; The decreased performance that can cause unit, and the decline of the interior oil mass of fuel tank, even can cause the lubricants capacity deficiency and the phenomenon of damage bearing.
The model utility content
The utility model aims to provide and a kind ofly when unit operation environment unstable, prevents that effectively lubricant oil from entering into the centrifugal compressor and the back end cover for motor thereof of vaporizer, and a large amount of lubricant oil enter into the problem of vaporizer when unusual with resolution system.
An aspect according to the utility model; A kind of centrifugal compressor back end cover for motor is provided; Rear end cover have shoe cream room and with the spill port of shoe cream room conducting; Rear end cover comprises the plat part that cooperates with compressor housing, and a side of plat part has the housing section of evagination, forms shoe cream room between housing section and the plat part; A side relative with housing section on the plat part has the axis hole that cooperates with the centrifugal compressor electric machine main shaft.
Further, the outer surface of housing section is curved.
Further, the internal surface of housing section is curved.
Another aspect according to the utility model also provides a kind of centrifugal compressor, comprises housing, and enclosure interior is provided with motor, and centrifugal compressor also comprises aforesaid centrifugal compressor back end cover for motor, and rear end cover is equipped with on housing.
Further, have the sealed department of fitted seal between the main shaft of housing and motor, have the sealing gland hole that is connected with the spiral case of centrifugal compressor on the sealed department.
Further, have first vent cap on the housing, the entry end of first vent cap is connected with the spiral case of centrifugal compressor; Has second vent cap that connects the sealing gland hole and first vent cap on the rear end cover.
Further, be set with sliding bearing in the axis hole of rear end cover, have the first fuel feeding duct corresponding on the rear end cover with the oil inlet hole of sliding bearing.
Further, lower part of frame is provided with fuel tank, and enclosure interior is provided with the second fuel feeding duct that connects the fuel tank and the first fuel feeding duct.
Further, centrifugal compressor also comprises oil returning tube, and the two ends of oil returning tube connect spill port and fuel tank respectively.
Further, sliding bearing passes through the Bearing Installation screw on rear end cover.
Further, sliding bearing and rear end cover are isolated through the insulating part insulation.
Further, insulating part comprises dead ring and insulating bush, and dead ring is arranged between sliding bearing and the rear end cover, and insulating bush is arranged between Bearing Installation screw and the sliding bearing.
Centrifugal compressor and back end cover for motor thereof according to the utility model; One side of rear end cover has the housing section of evagination, thereby has increased the volume of the shoe cream room of housing section inside, is using under the identical materials at rear end cover; More oil storage space is provided; When system's fluctuation of service, bigger oil storage space can form certain buffering, thereby prevents oil pressure from increasing excessive at short notice and cause lubricant oil to get in the vaporizer in a large number.
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 centrifugal compressor perspective view according to the utility model;
Fig. 2 be among Fig. 1 B-B to cross-sectional schematic;
Fig. 3 is the partial enlarged drawing at label I place among Fig. 2;
Fig. 4 is the partial enlarged drawing at label II place among Fig. 2;
Fig. 5 be among Fig. 1 C-C to cross-sectional schematic;
Fig. 6 be among Fig. 5 A to partial schematic diagram; And
Fig. 7 is the partial enlarged drawing at label III place among Fig. 5.
Embodiment
Below with reference to accompanying drawing and combine embodiment to specify the utility model.
Like Fig. 1,2, shown in 5; According to the centrifugal compressor back end cover for motor 10 of the utility model have shoe cream room 11 and with the spill port 12 of shoe cream room 11 conductings; Rear end cover 10 comprises the plat part that cooperates with compressor housing 20; One side of plat part has the housing section of evagination, forms shoe cream room 11 between housing section and the plat part; A side relative with housing section on the plat part has the axis hole 13 that cooperates with the centrifugal compressor electric machine main shaft.One side of rear end cover has the housing section of evagination; Thereby increased the volume of the shoe cream room 11 of housing section inside; Using under the identical materials at rear end cover, more oil storage space is being provided, when system's fluctuation of service; Bigger oil storage space can form certain buffering, thereby prevents oil pressure from increasing excessive at short notice and cause lubricant oil to get in the vaporizer in a large number.
Preferably, curved of the outer surface of housing section and internal surface are using under the identical materials, and the volume of shoe cream room 11 is bigger, and more preferably, the outer surface and the internal surface of housing section are hemisphere face, and the volume of shoe cream room 11 is maximum.
Increase the oil storage space of shoe cream room 11; Can be when unit be just started shooting when fluctuation appears in system running environment in system's instability or the running; For system provides a buffer time; In machine set system running environment is recovered stable process, can the oil return of motor temporarily be stored in the shoe cream room 11.And because shoe cream room 11 volumes increase; Oil pressure can not be raised to very high at short notice; Causing lubricant oil to get in the motor cavity mixes with refrigerant; Guarantee that the least possible lubricant oil enters into vaporizer in the time period of distance refrigerant purification next time, for the reliability of unit assurance is provided like this.
As shown in Figure 1, the utility model also provides a kind of centrifugal compressor, comprises housing 20; Enclosure interior is provided with motor; Centrifugal compressor also comprises aforesaid centrifugal compressor back end cover for motor, and rear end cover 10 is equipped with on housing 20, and the cavity that housing 20 is formed seals.
Has the sealed department 21 that cooperates between the main shaft of housing 20 and motor; Sealed department 21 tops have lubricant oil; The bottom of sealed department 21 is the compressor electric motor cavity, and 21 pairs of lubricant oil of sealed department and motor cavity are isolated, thereby prevents that lubricant oil from getting into the motor inside cavity and finally getting into vaporizer.The sealing means of sealed department 21 can be labyrinth seal or labyrinth seal, and also the mixing that combines with labyrinth seal of labyrinth seal seals.
Because sealed department 21 is not absolute sealing, unstable when compressor operating, the pressure of shoe cream room 11 that causes rear end cover 10 is during greater than the pressure of motor cavity; Lubricant oil will get into the motor cavity from shoe cream room 11, gets into the motor cavity in order to reduce lubricant oil, like Fig. 2 and shown in Figure 4; At sealed department 21 sealing gland hole 22 is set; Sealing gland hole 22 is connected with the spiral case of compressor, and the pressurized gas that are about to the compressor scroll place cause sealed department 21 places, thereby makes sealed department 21 places produce very high back pressure; Thereby stop the lubricant oil of lubricating bearings to get into the motor cavity, further improve sealing effect.
Preferably; Like Fig. 1,2 and shown in Figure 4; Has first vent cap 23 on the housing 20; The entry end of first vent cap 23 is connected with the spiral case of centrifugal compressor, has second vent cap 14 that connects the sealing gland hole 22 and first vent cap 23 on the rear end cover 10, promptly passes through the pressurized gas importing sealed department 21 places formation oil resistance sealing gland of the duct of housing 20 and rear end cover 10 set inside with the spiral case place.
Like Fig. 5 and shown in Figure 7, be set with sliding bearing 30 in the axis hole 13 of rear end cover 10, have oil inlet hole on the sliding bearing 30, when electric machine main shaft rotates, form oil film between sliding bearing 30 and the electric machine main shaft electric machine main shaft is formed support.Have the first fuel feeding duct 15 corresponding on the rear end cover 10, continuous fuel feeding in the oil inlet hole of sliding bearing 30 from the first fuel feeding duct 15, lubricated and support to sliding bearing and electric machine main shaft with the oil inlet hole of sliding bearing 30.
The bottom of compressor housing 20 is provided with fuel tank 40, and housing 20 is provided with the second fuel feeding duct 24 that connects the fuel tank 40 and the first fuel feeding duct 15, and fuel tank 40 is constantly to the first fuel feeding duct, 15 supplying lubricating oils.The outer installment of housing 20 has oil returning tube, and oil returning tube directly connects spill port 12 and fuel tank 40.Traditional relatively return tube converges into one the tunnel with the lubricant oil that the lubricant oil of motor rear end causes motor front end and motor fore bearing, gets back to the fuel tank mode together, has prevented effectively before and after the motor that pressure is unequal and causes the unusual problem of oil return.
Advantages such as as shown in Figure 6, at spill port 12 places, oil returning tube is connected with spill port 12 through flange 12a, compares traditional stop valve and connects, and has good sealing effect, and shake-proof ability is strong.
Pass through motor bearings for the shaft current that prevents motor, burn the Babbitt alloy of sliding bearing 30, as shown in Figure 3, sliding bearing 30 is isolated through insulating part 50 insulation.Be to be provided with dead ring 51 between the axis hole 13 of sliding bearing 30 and rear end cover 10; Fixedly be provided with insulating bush 52 between the Bearing Installation screw 31 of sliding bearing 30 and the sliding bearing 30, thereby prevent that electric current is delivered to sliding bearing 30 through rear end cover or Bearing Installation screw 31.
From above description, can find out that the utility model the above embodiments have realized following technique effect:
The utility model centrifugal compressor and back end cover for motor thereof through increasing the oil storage space of rear end cover shoe cream room, form certain buffering to system, thereby it is excessive to prevent that oil pressure from increasing suddenly; In addition, introduce air seal set, further improve sealing effect.The utility model has guaranteed effectively that through two aspects the least possible lubricant oil enters into vaporizer in the time period of distance refrigerant purification next time, improves the reliability of unit.
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 (12)
1. centrifugal compressor back end cover for motor, said rear end cover (10) have shoe cream room (11) and with the spill port (12) of said shoe cream room (11) conducting, it is characterized in that,
Said rear end cover (10) comprises the plat part that cooperates with compressor housing (20), and a side of said plat part has the housing section of evagination, forms said shoe cream room (11) between said housing section and the said plat part;
A side relative with said housing section has the axis hole (13) that cooperates with the centrifugal compressor electric machine main shaft on the said plat part.
2. centrifugal compressor back end cover for motor according to claim 1 is characterized in that, curved of the outer surface of said housing section.
3. centrifugal compressor back end cover for motor according to claim 1 is characterized in that, curved of the internal surface of said housing section.
4. centrifugal compressor; Comprise housing (20), said housing (20) set inside has motor, it is characterized in that; Said centrifugal compressor also comprises each described centrifugal compressor back end cover for motor in the claim 1 to 3, and said rear end cover (10) is equipped with on said housing (20).
5. centrifugal compressor according to claim 4; It is characterized in that; The sealed department (21) that has fitted seal between the main shaft of said housing (20) and said motor has the sealing gland hole (22) that is connected with the spiral case of said centrifugal compressor on the said sealed department (21).
6. centrifugal compressor according to claim 5 is characterized in that,
Have first vent cap (23) on the said housing (20), the entry end of said first vent cap (23) is connected with the spiral case of said centrifugal compressor;
Has second vent cap (14) that connects said sealing gland hole (22) and said first vent cap (23) on the said rear end cover (10).
7. centrifugal compressor according to claim 4 is characterized in that,
Be set with sliding bearing (30) in the axis hole (13) of said rear end cover (10), have the first fuel feeding duct (15) corresponding on the said rear end cover (10) with the oil inlet hole of said sliding bearing (30).
8. centrifugal compressor according to claim 7 is characterized in that,
The bottom of said housing (20) is provided with fuel tank (40), and said housing (20) is provided with the second fuel feeding duct (24) that connects said fuel tank (40) and the said first fuel feeding duct (15).
9. centrifugal compressor according to claim 8 is characterized in that said centrifugal compressor also comprises oil returning tube, and the two ends of said oil returning tube connect said spill port (12) and said fuel tank (40) respectively.
10. centrifugal compressor according to claim 7 is characterized in that, said sliding bearing (30) is fixed on the said rear end cover (10) through Bearing Installation screw (31).
11. centrifugal compressor according to claim 10 is characterized in that, said sliding bearing (30) is isolated through insulating part (50) insulation with said rear end cover (10).
12. centrifugal compressor according to claim 11 is characterized in that,
Said insulating part (50) comprises dead ring (51) and insulating bush (52); Said dead ring (51) is arranged between said sliding bearing (30) and the said rear end cover (10), and said insulating bush (52) is arranged between said Bearing Installation screw (31) and the said sliding bearing (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220221864 CN202579335U (en) | 2012-05-16 | 2012-05-16 | Centrifugal compressor and motor rear end cover thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220221864 CN202579335U (en) | 2012-05-16 | 2012-05-16 | Centrifugal compressor and motor rear end cover thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202579335U true CN202579335U (en) | 2012-12-05 |
Family
ID=47248751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220221864 Expired - Lifetime CN202579335U (en) | 2012-05-16 | 2012-05-16 | Centrifugal compressor and motor rear end cover thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202579335U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423202A (en) * | 2012-05-16 | 2013-12-04 | 珠海格力电器股份有限公司 | Centrifugal compressor and motor rear end cover thereof |
| CN108071591A (en) * | 2016-11-07 | 2018-05-25 | 日立江森自控空调有限公司 | Coolant compressor |
| EP3786459A4 (en) * | 2018-11-15 | 2021-10-20 | Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | Centrifugal compressor and turbocharger equipped with centrifugal compressor |
-
2012
- 2012-05-16 CN CN 201220221864 patent/CN202579335U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423202A (en) * | 2012-05-16 | 2013-12-04 | 珠海格力电器股份有限公司 | Centrifugal compressor and motor rear end cover thereof |
| CN103423202B (en) * | 2012-05-16 | 2015-11-25 | 珠海格力电器股份有限公司 | Centrifugal compressor |
| CN108071591A (en) * | 2016-11-07 | 2018-05-25 | 日立江森自控空调有限公司 | Coolant compressor |
| CN108071591B (en) * | 2016-11-07 | 2020-03-10 | 日立江森自控空调有限公司 | Refrigerant compressor |
| EP3786459A4 (en) * | 2018-11-15 | 2021-10-20 | Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | Centrifugal compressor and turbocharger equipped with centrifugal compressor |
| US11326622B2 (en) | 2018-11-15 | 2022-05-10 | Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | Oil cooled centrifugal compressor and turbocharger including the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121205 Effective date of abandoning: 20151125 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |