CN100552234C - Centrifugal compressor rotor mechanism - Google Patents
Centrifugal compressor rotor mechanism Download PDFInfo
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- CN100552234C CN100552234C CNB2006101566479A CN200610156647A CN100552234C CN 100552234 C CN100552234 C CN 100552234C CN B2006101566479 A CNB2006101566479 A CN B2006101566479A CN 200610156647 A CN200610156647 A CN 200610156647A CN 100552234 C CN100552234 C CN 100552234C
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- centrifugal compressor
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Abstract
A kind of centrifugal compressor rotor mechanism, it connects a power take-off, and in order to block oil leak and to reclaim lubricant oil to one oil sump.This rotor mechanism comprises the rotating shaft that is provided with rolling bearing and nut, the bearing support that carries this rolling bearing at least, and the bearing plate that is bonded to this bearing support.This nut surface is provided with oil thrower, and this bearing support is provided with spill port, and this bearing plate is provided with the oil guide slot that is switched to this spill port, and is provided with first labyrinth ring with sheathed contact nut by this bearing support or bearing plate.To this oil sump, and thereby this oil thrower of mat leaks from this first labyrinth ring to block lubricant oil the lubricant oil that guiding is oozed out from this rolling bearing through this oil guide slot and this spill port.
Description
Technical field
The present invention relates to a kind of centrifugal compressor, refer to a kind of centrifugal compressor rotor mechanism that blocks oil leak and reclaim lubricant oil especially.
Background technique
Along with the continuous development of compressor science and technology, its rotating speed and performance demands also day by day improve.As shown in Figure 1, U.S. Patent No. 4,938,664 applications have disclosed a kind of lubricant recovery device that is applied to centrifugal compressor, its quote high pressure refrigerant thrust and guide lubricant oil by the lower edge of inlet end 102 corresponding housing to oil sump 101.And refrigerant is with blade 100 rotation compressions by inlet end 102, wherein have jet-type group Pu 106 with the moving lubricant oil of pump from opening 105 through low-pressure line 104 to oil sump 101, and utilize this jet-type group moving higher pressure cold media air of Pu 106 pumps from opening 108 through high pressure line 107 to oil sump 101, avoid the low-lying area after lubricant oil accumulates on the refrigerant air inlet.
Though above-mentioned patent application provides the design of reclaiming lubricant oil, does not effectively block design, causes the shortcoming in lubricant pollution refrigerant loop.Be under the situation of high voltage terminal particularly based on the refrigerant loop, add that this patent application uses the last item that surges to hold supporting revolving shaft, because need long-time foundation to support oil pressure when starting, during because do not set up the cause of pressure reduction, very easily cause lubricant oil to infiltrate in the refrigerant loop and contaminated refrigerant purity.In addition, the last item that surges holds that efficient is relatively poor, and rigidity is lower, needs long-time foundation to support oil pressure during startup, and the last item that surges holds surperficial dead-soft, very easily damages because of the compressor hang-up.When separating lubricant oil liquid, may not meet the requirement of high purity of refrigerant again, therefore meeting Mixed lubrication oily vapours is necessary to be improved.
And for example shown in Figure 2, U. S. Patent NO.4,997,340 applications disclose a kind of buffer area seal arrangement that is applied to centrifugal compressor, it is in order to sealing drive area and motor-end power-section, to reduce loss in efficiency, prevent that refrigerant from leaking into power-section by drive area, it comprises that one is installed on the labyrinth ring (labyrinth seal) 113 between buffer area 112 and the drive area 109.This labyrinth ring 113 passes through a porosity communication to impeller 110 regions, impeller 110 regions are because air-flow compression and a little higher than drive area 109 of cold media air pressure, therefore behind the high pressure refrigerant gas pressure arrival labyrinth ring 113 from impeller 110 regions, can block the drive area oil leak to buffer area 112 (linking power-section), and with the lubrication pressure oil sump 111 of withdrawing.
Though this patent application is better than last patent application because adopting the design of labyrinth ring 113.Yet when starting, the volute pressure of centrifugal compressor is still low, be used for the lubricant oil of lubricating bearings might be along the high speed shaft gap or labyrinth ring 113 flee in the refrigerant loop, therefore must be blocked, avoid lubricant oil to run off.Especially to be to use the last item that surges to hold efficient relatively poor for this technology, and rigidity is lower, needs long-time foundation to support oil pressure during startup, and the last item that surges holds surperficial dead-soft, very easily damages because of the compressor hang-up.After startup is finished, through the high pressure refrigerant of impeller 110 compressions, also may cause refrigerant to run off and the reduction compressor efficiency along slot leakage to the low pressure place, therefore must be blocked, to improve compressor efficiency.
So above-mentioned two kinds of prior aries, though the lubricant oil recovering effect of centrifugal compressor can be provided, but cause anxiety for the sealing effect that separates refrigerant and lubricant oil, particularly fail before lubricant oil infiltrates the impeller region, to be stopped, be the great disappearance in the design in fact.Simultaneously, make the desire fluid bearing exist startup to build and press shortcoming slow, that maintenance is difficult for, and use labyrinth ring also can not guarantee isolated effect merely, and use single impeller also to cause the problem of oil impregnate easily because dorsal part pressure reduction causes axial force, therefore be necessary to be improved.
Like this, how effectively solve the disappearance of above-mentioned prior art, improving the labyrinth ring structure, and the structure of buffering height pressure, and to use the structure more appropriate than fluid bearing also be the required of art technology, for needing the problem of solution at present badly.
Summary of the invention
The shortcoming of background technique in view of the above, one object of the present invention is to provide a kind of centrifugal compressor rotor mechanism, with the enhanced leaktightness effect, blocks lubricant pollution refrigerant loop.
Another object of the present invention is to provide a kind of centrifugal compressor rotor mechanism, leaks to prevent the cold high pressure matchmaker.
Another purpose of the present invention is to provide a kind of centrifugal compressor rotor mechanism, and it uses rolling bearing to improve compressor efficiency.
A further object of the present invention is to provide a kind of centrifugal compressor rotor mechanism, reclaims usefulness to promote lubricant oil.
For achieving the above object and other purposes, the invention provides a kind of centrifugal compressor rotor mechanism, it supplies to connect a power take-off, and in order to block oil leak and to reclaim lubricant oil to one oil sump.This rotor mechanism comprises at least: rotating shaft, divide into driving side and back flow side, be provided with in regular turn in order to the joint, rolling bearing and the locking that connect this power take-off towards the direction of back flow side from this driving side and be provided with the nut of oil thrower to locate this rolling bearing in this rotating shaft and towards drive side surface, this back flow side then is provided with one first impeller at least; Bearing support is located at the driving side of this rotating shaft and is carried this rolling bearing, and has the spill port towards driving side; And bearing plate, be sheathed on this nut outside and be bonded to this bearing support, to fix this rolling bearing outer shroud, it has and first labyrinth ring of this nut surface formation sealing and the oil guide slot that is switched to this spill port, thereby the lubricant oil that oozes out from this rolling bearing for guiding is through this oil guide slot and this spill port and this oil sump that arrives, and this oil thrower of mat leaks from this first labyrinth ring to block lubricant oil.
The present invention also provides a kind of centrifugal compressor rotor mechanism, and it supplies to connect a power take-off, and in order to block oil leak and to reclaim lubricant oil to one oil sump.This rotor mechanism comprises at least: rotating shaft, divide into driving side and back flow side, be provided with in regular turn in order to the joint, rolling bearing and the locking that connect this power take-off towards the direction of back flow side from this driving side and be provided with the nut of oil thrower to locate this rolling bearing in this rotating shaft and towards drive side surface, this back flow side then is provided with one first impeller at least; Bearing support is sheathed on this nut outside and carries this rolling bearing, sealing the path of this rolling bearing towards back flow side, and have towards the spill port of driving side, and contact to first labyrinth ring of this nut surface; And bearing plate, be located at the driving side of this rotating shaft and be bonded to this bearing support, it has the oil guide slot that is switched to this spill port, thereby for guiding lubricant oil from this rolling bearing through this spill port and this oil guide slot and this oil sump that arrives, and this oil thrower of mat leaks from this first labyrinth ring to block lubricant oil.
Aforementioned rolling bearing can be ball bearing or roller bearing; This oil thrower can be annular recess structure or the ring-type projective structure of being located at this nut edge.In a preferred embodiment, this first impeller can connect one second labyrinth ring body towards driving side, its have second labyrinth ring with this first impeller seals fit.In another preferred embodiment, also can have one second impeller, it is located at the back flow side of this rotating shaft, and is adjacent to this first impeller.In a preferred embodiment again, also can have middle spacer ring, its back flow side of being located at this rotating shaft is relatively between this first impeller and this second impeller.Preferably, this second impeller near should in the side of spacer ring connect one the 3rd labyrinth ring body, have the 3rd labyrinth ring with this in the spacer ring stuffing box gland close, in addition, the shoulder of this second impeller can be laid with several intercommunicating pores, in order to this second impeller dorsal part of external connection.
The prior art of using the last item that surges to hold than the conventional centrifugal compressor rotation shaft, the higher rolling bearing of utilization efficiency of the present invention replaces the last item that surges and makes to supporting, rolling bearing by fixed by nut in rotating shaft, rolling bearing is placed in the bearing support, an end combines and is fixed with this bearing support with bearing plate again.Since nut have oil thrower, bearing plate be provided with oil guide slot, and bearing plate or bearing support one of them be provided with first labyrinth ring with nut sealing fit, so can guarantee to guide lubricant oil from this rolling bearing through this oil guide slot and this spill port and the oil sump that arrives.In addition, second labyrinth ring and the 3rd labyrinth ring are set, thereby prevent that effectively the high pressure refrigerant runs off, to improve compressor efficiency by suitable aforementioned location; And several intercommunicating pores of the second impeller shoulder, it is in order to the external connection second impeller dorsal part, that is is communicated with the high pressure refrigerant to inlet end, and the second impeller back side pressure is minimized, and reduces because the end thrust that the second impeller back side pressure produces.Hence one can see that, and the present invention overcomes the disappearance of background technique relatively, actual industrial utilization with height.
Description of drawings
Fig. 1 is the lubricant recovery device sectional drawing of existing U.S. Patent No. 4,938,664 applications;
Fig. 2 is the sealing device structure sectional drawing of existing U.S. Patent No. 4,997,340 applications;
Fig. 3 is applied to the sectional drawing of centrifugal compressor for centrifugal compressor rotor mechanism of the present invention;
Fig. 4 is the local enlarged diagram of Fig. 3;
Fig. 5 A is two views of bearing plate of the present invention;
Fig. 5 B and Fig. 5 C are two kinds of package assembly embodiment schematic representation of bearing support of the present invention and bearing plate; And
Fig. 6 A and Fig. 6 B are two kinds of structure embodiment schematic representation of oil thrower of the present invention.
[primary component symbol description]
100 blades
101 oil sumps
102 inlet ends
103 shell caves
104 low-pressure line
105 openings
106 jet-types group Pu
107 high pressure lines
108 openings
109 drive areas
110 impellers
111 oil sumps
112 buffer areas
113 labyrinth rings
20 rotating shafts
201 driving sides
2019 rolling bearings
202 back flow sides
2020,2021 bearing supports
2022,2023 spill ports
2024,2025 bearing plates
2026,2027 oil guide slot
2029 rolling bearings
203 joints
205 nuts
2041,204 first labyrinth rings
2053,2052 oil throwers
207 first impellers
2,071 second labyrinth ring bodies
2072 flanges
2,073 second labyrinth rings
Spacer ring in 208
2081 the 3rd labyrinth ring bodies
2082 the 3rd labyrinth rings
209 second impellers
2091 shoulders
2092 intercommunicating pores
210 inlet ends
30 oil sumps
40 power take-off
Embodiment
Those skilled in the art below cooperate graphic explanation specific embodiments of the invention, so that can understand technical characteristics of the present invention easily and reach effect.
See also Fig. 3 and Fig. 4, the invention provides a kind of centrifugal compressor rotor mechanism, it supplies to connect a power take-off 40, and in order to block oil leak and to reclaim lubricant oil to one oil sump 30.This rotor mechanism comprises at least: rotating shaft 20, divide into driving side 201 and back flow side 202, be provided with in regular turn in order to the joint 203, rolling bearing 2029 and the locking that connect this power take-off 40 to locate this rolling bearing 2029 in this rotating shaft 20 and be provided with the nut 205 of oil thrower 2053 towards driving side 201 surfaces towards the direction of back flow side 202 from this driving side 201,201 of this back flow sides are provided with one first impeller 207 at least; Bearing support 2021 is located at the driving side 201 of this rotating shaft 20 and is carried this rolling bearing 2029, and has the spill port 2023 towards driving side 201; And bearing plate 2025, be sheathed on these nut 205 outsides and be bonded to this bearing support 2021, to fix this rolling bearing 2029 outer shrouds, it has and first labyrinth ring 204 of this nut 205 surface formation sealings and the oil guide slot 2027 that is switched to this spill port 2023, thereby the lubricant oil that oozes out from this rolling bearing 2029 for guiding is through this oil guide slot 2027 and this spill port 2023 and this oil sump 30 that arrives, and this oil thrower 2053 of mat leaks from this first labyrinth ring 204 to block lubricant oil.
In the present embodiment, driving side 201 ends of this rotating shaft 20 also are provided with a rolling bearing 2019, with rolling bearing 2029 in the same manner, all can adopt ball bearing or roller bearing.Secondly, this first impeller 207 connects one second labyrinth ring body 2071 towards driving side 201, it has second labyrinth ring 2073, and these first impeller, 207 dorsal parts are provided with flange 2072 connecting this second labyrinth ring 2073, thus the flange of these first impeller, 207 dorsal parts of mat 2072 and this second labyrinth ring, 2073 sealing fits.In addition, also has one second impeller 209, it is located at the back flow side 202 of this rotating shaft 20, and be adjacent to this first impeller 207, between back flow side 202 relative these first impellers 207 and this second impeller 209 of this rotating shaft 20, spacer ring 208 in also being provided with, and this second impeller 209 connects one the 3rd labyrinth ring body 2081 near the side of being somebody's turn to do middle spacer ring 208, its have the 3rd labyrinth ring 2082 with this in spacer ring 208 sealing fits, moreover, the shoulder 2091 of this second impeller 209 is laid with several intercommunicating pores 2092, in order to these second impeller, 209 dorsal parts of external connection, that is the inlet end 210 of connection high pressure refrigerant.Described this second impeller 209 approaches inlet end 210 and is considered as the impeller of the first order, and described this first impeller 207 is considered as partial impeller in the back.
Consult shown in Figure 5ly, this bearing plate 2025 is sheathed on these nut 205 outsides and is bonded to this bearing support 2021, and its inner headed face is provided with for first labyrinth ring 204 of contact to these nut 205 outer round surface.Secondly, also be provided with an oil guide slot 2027 in nearly bottom, keep a suitable spacing to be switched to this rolling bearing 2029 and this spill port 2023 passages between this oil guide slot 2027 and this rolling bearing 2029 with formation, thereby the lubricant oil that oozes out from this rolling bearing 2029 for guiding is through this oil guide slot 2027 and this spill port 2023 and this oil sump 30 that arrives, and this oil thrower 2053 of mat leaks from this first labyrinth ring 204 to block lubricant oil.
Fig. 5 B shows the local enlarged diagram of present embodiment.Wherein this bearing support 2021 is located at the driving side 201 of this rotating shaft 20 and is carried this rolling bearing 2029, and has the spill port 2023 towards driving side 201; And this bearing plate 2025 is sheathed on these nut 205 outsides and is bonded to this bearing support 2021, to fix this rolling bearing 2029 outer shrouds, it has contact to first labyrinth ring 204 on these nut 205 surfaces and the oil guide slot 2027 that is switched to this spill port 2023, constitute the recovery path of guiding lubricant oil thus, yet be not only to exceed with shown in the present embodiment.
In addition can be shown in Fig. 5 C, bearing support 2020 is sheathed on these nut 205 outsides and carries this rolling bearing 2029, fixing this rolling bearing 2029 outer shrouds, and have towards the spill port 2022 of driving side 201, and contact to first labyrinth ring 2041 on these nut 205 surfaces; And this bearing plate 2024 is located at the driving side 201 of this rotating shaft 20 and be bonded to this bearing support 2020, it has the oil guide slot 2026 that is switched to this spill port 2022, thereby the lubricant oil that oozes out from this rolling bearing 2029 for guiding can constitute the recovery path of guiding lubricant oil thus equally through this spill port 2022 and this oil guide slot 2026 and the oil sump 30 that arrives.
Consult shown in Fig. 6 A, the oil thrower 2053 on these nut 205 surfaces, for being located at the ring-type projective structure at these nut 205 edges, thereby in these rotating shaft 20 high speed rotating processes, by centrifugal force lubricant oil is thrown away the surface of this nut 205, break through first labyrinth ring 204 along the side that axially leaks out to this nut 205 to prevent lubricant oil.In addition, based on identical technological thought, also can be shown in Fig. 6 B, oil thrower 2052 with these nut 205 surfaces, be located at the annular recess structure at these nut 205 edges instead, and the edge of annular recess structure also forms the inclined-plane or cambered surface, but same mat centrifugal force throws away the surface of this nut 205 with lubricant oil, breaks through first labyrinth ring 204 to prevent lubricant oil along the side that axially leaks out to this nut 205.
The conventional centrifugal compressor rotation shaft uses the last item that surges to hold, and the higher rolling bearing 2019,2029 of utilization efficiency of the present invention replaces the last item that surges and makes to supporting; Rolling bearing 2029 usefulness nuts 205 are fixed in the rotating shaft 20, rolling bearing 2029 are placed in the bearing support 2021 end fixedly rolling bearing 2029 of bearing plate 2025 again; Nut 205 attached oil throwers 2053, on the bearing plate 2025 or bearing support 2020 with first labyrinth ring 204,2041, form seal action with nut 205, bearing plate 2024,2025 has oil guide slot 2026,2027, and the spill port 2023,2022 of bearing oil on bearing support led oil return pond 30.First impeller, 207 dorsal parts connect second labyrinth ring 2073 with flange 2072, and the flange 2072 and the second labyrinth ring body 2071 form and seal the high pressure coolant leakage of avoiding after compression; In 209 in middle spacer ring 208 and second impeller, arrange the 3rd labyrinth ring body 2081, with 208 one-tenth sealings of the 3rd labyrinth ring 2082 on it and middle spacer ring, be used for reducing high pressure refrigerant 33 and run off, to improve compressor efficiency; The second impeller shoulder 2091 is provided with several intercommunicating pores 2092, in order to be communicated with second impeller, 209 dorsal parts and inlet end 210, second impeller, 209 back side pressure is minimized, and reduces the end thrust that the impeller back side pressure produces.
Therefore, centrifugal compressor rotor mechanism provided by the present invention, can be applicable to centrifugal compressor so that compressor refrigerant and lubricant oil excellent sealing effect to be provided, and its rolling bearing operational paradigm is good, safeguard that labyrinth ring easy and the cooperation oil thrower also has the sealing effect of causing preferably to construct, therefore and multistage impeller also promotes compression effectiveness, for the prior art effect that has clear improvement.
The foregoing description is illustrative principle of the present invention and effect thereof only, but not is used to limit the present invention.Have in the technical field under any and know that usually the knowledgeable all can be under spirit of the present invention and category, the foregoing description is modified and changed.Therefore, the scope of the present invention should be as claimed in claim.
Claims (16)
1. centrifugal compressor rotor mechanism, it is for connecting a power take-off, and in order to block oil leak and to reclaim lubricant oil to one oil sump, this rotor mechanism comprises at least:
Rotating shaft, comprise a driving side and a back flow side, this driving side is provided with in order to the joint, rolling bearing and the locking that connect this power take-off to locate this rolling bearing in this rotating shaft and be provided with the nut of oil thrower towards this drive side surface in regular turn towards the direction of this back flow side certainly;
Bearing support is located at this driving side of this rotating shaft and is carried this rolling bearing, and has the spill port towards this driving side;
Bearing plate is sheathed on this nut outside and is bonded to this bearing support, and to fix this rolling bearing, this bearing plate has contact to first labyrinth ring of this nut surface and the oil guide slot that is switched to this spill port;
First impeller, it is located at this back flow side of this rotating shaft, and this first impeller connects one second labyrinth ring body towards the side of this bearing plate, this second labyrinth ring body have one second labyrinth ring with this first impeller seals fit; And
Second impeller, it is located at this back flow side of this rotating shaft, and is adjacent to this first impeller.
2. centrifugal compressor rotor mechanism according to claim 1, wherein, this rolling bearing is ball bearing or roller bearing.
3. centrifugal compressor rotor mechanism according to claim 1 also has spacer ring in, and it is located between relative this first impeller of this back flow side and this second impeller of this rotating shaft.
4. centrifugal compressor rotor mechanism according to claim 3, wherein, this second impeller near should in the side of spacer ring connect one the 3rd labyrinth ring body, the 3rd labyrinth ring body have one the 3rd labyrinth ring with this in the spacer ring stuffing box gland close.
5. centrifugal compressor rotor mechanism according to claim 4, wherein, the shoulder of this second impeller is laid with several intercommunicating pores, in order to this second impeller dorsal part of external connection.
6. centrifugal compressor rotor mechanism according to claim 1, wherein, this oil thrower is an annular recess structure of being located at this nut edge.
7. centrifugal compressor rotor mechanism according to claim 1, wherein, this oil thrower is a ring-type projective structure of being located at this nut edge.
8. centrifugal compressor rotor mechanism according to claim 1, wherein, this joint is a gear.
9. centrifugal compressor rotor mechanism, it is for connecting a power take-off, and in order to block oil leak and to reclaim lubricant oil to one oil sump, this rotor mechanism comprises at least:
Rotating shaft, comprise a driving side and a back flow side, this driving side is provided with in order to the joint, rolling bearing and the locking that connect this power take-off to locate this rolling bearing in this rotating shaft and be provided with the nut of oil thrower towards this drive side surface in regular turn towards the direction of this back flow side certainly;
Bearing support is sheathed on this nut outside and carries this rolling bearing, and to fix this rolling bearing, this bearing support has towards the spill port of this driving side, reaches first labyrinth ring of contact to this nut surface;
Bearing plate is located at this driving side of this rotating shaft and is bonded to this bearing support, and this bearing plate has the oil guide slot that is switched to this spill port;
First impeller, it is located at this back flow side of this rotating shaft, and this first impeller connects one second labyrinth ring body towards the side of this bearing support, this second labyrinth ring body have one second labyrinth ring with this first impeller seals fit; And
Second impeller, it is located at this back flow side of this rotating shaft, and is adjacent to this first impeller.
10. centrifugal compressor rotor mechanism according to claim 9, wherein, this rolling bearing is ball bearing or roller bearing.
11. centrifugal compressor rotor mechanism according to claim 9 also has spacer ring in, it is located between relative this first impeller of this back flow side and this second impeller of this rotating shaft.
12. centrifugal compressor rotor mechanism according to claim 11, wherein, this second impeller near should in the side of spacer ring connect one the 3rd labyrinth ring body, the 3rd labyrinth ring body have one the 3rd labyrinth ring with this in the spacer ring stuffing box gland close.
13. centrifugal compressor rotor mechanism according to claim 12, wherein, the shoulder of this second impeller is laid with several intercommunicating pores, in order to this second impeller dorsal part of external connection.
14. centrifugal compressor rotor mechanism according to claim 9, wherein, this oil thrower is an annular recess structure of being located at this nut edge.
15. centrifugal compressor rotor mechanism according to claim 9, wherein, this oil thrower is a ring-type projective structure of being located at this nut edge.
16. centrifugal compressor rotor mechanism according to claim 9, wherein, this joint is a gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101566479A CN100552234C (en) | 2006-12-29 | 2006-12-29 | Centrifugal compressor rotor mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101566479A CN100552234C (en) | 2006-12-29 | 2006-12-29 | Centrifugal compressor rotor mechanism |
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| CN101210574A CN101210574A (en) | 2008-07-02 |
| CN100552234C true CN100552234C (en) | 2009-10-21 |
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| CNB2006101566479A Active CN100552234C (en) | 2006-12-29 | 2006-12-29 | Centrifugal compressor rotor mechanism |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713419B (en) * | 2009-11-24 | 2012-06-20 | 江苏大学 | Oil throwing, oil receiving and cooling device for high-temperature pump bearing body |
| CN105298871B (en) * | 2014-06-23 | 2018-04-03 | 重庆美的通用制冷设备有限公司 | Cantilever centrifugal compressor |
| CN105422479B (en) * | 2015-12-16 | 2018-04-06 | 重庆美的通用制冷设备有限公司 | Centrifugal compressor and there is its refrigeration system |
| WO2019171740A1 (en) * | 2018-03-05 | 2019-09-12 | パナソニック株式会社 | Dynamic compressor and refrigeration cycle device |
| JP7187292B2 (en) * | 2018-03-05 | 2022-12-12 | パナソニックホールディングス株式会社 | Speed compressor and refrigeration cycle equipment |
| JP7461789B2 (en) | 2020-04-27 | 2024-04-04 | パナソニックホールディングス株式会社 | Speed type compressor and refrigeration cycle device |
| CN114412823B (en) * | 2022-01-06 | 2023-02-17 | 珠海格力电器股份有限公司 | Control mechanism and method of bearing refrigerant lubricating system, compressor and air conditioning equipment |
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| CN1216804A (en) * | 1997-11-03 | 1999-05-19 | 运载器有限公司 | Two piece labyrinth seal for centrifugal compressor balance piston |
| JP3018689B2 (en) * | 1991-12-18 | 2000-03-13 | 日本電気株式会社 | Magneto-optical head device |
| CN2620098Y (en) * | 2003-04-23 | 2004-06-09 | 费传华 | Vertical turbine pressurizer for vehicle |
| CN1710285A (en) * | 2005-06-29 | 2005-12-21 | 湖北双剑鼓风机制造有限公司 | Sulfuric acid centrifugal blower for plateau |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4125345A (en) * | 1974-09-20 | 1978-11-14 | Hitachi, Ltd. | Turbo-fluid device |
| JP3018689B2 (en) * | 1991-12-18 | 2000-03-13 | 日本電気株式会社 | Magneto-optical head device |
| CN1216804A (en) * | 1997-11-03 | 1999-05-19 | 运载器有限公司 | Two piece labyrinth seal for centrifugal compressor balance piston |
| CN2620098Y (en) * | 2003-04-23 | 2004-06-09 | 费传华 | Vertical turbine pressurizer for vehicle |
| CN1710285A (en) * | 2005-06-29 | 2005-12-21 | 湖北双剑鼓风机制造有限公司 | Sulfuric acid centrifugal blower for plateau |
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| CN101210574A (en) | 2008-07-02 |
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