CN209340166U - Multi-online air-conditioning system - Google Patents
Multi-online air-conditioning system Download PDFInfo
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- CN209340166U CN209340166U CN201822189985.3U CN201822189985U CN209340166U CN 209340166 U CN209340166 U CN 209340166U CN 201822189985 U CN201822189985 U CN 201822189985U CN 209340166 U CN209340166 U CN 209340166U
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- motor
- compressor
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Abstract
The utility model provides a kind of multi-online air-conditioning system, including centrifugal compressor (100), the centrifugal compressor (100) includes rotor, the main shaft (101) of the rotor is equipped with multi-stage impeller, axial bearing and transverse bearing, and at least one of the axial bearing and transverse bearing are gas bearing.The not high problem of compression ratio that multi-stage impeller improves multi-online air-conditioning system is provided, is increased by using the temperature that gas bearing improves the oil-lubricated bearing under the high revolving speed of rotor and problem that frictional dissipation is big.
Description
Technical field
The utility model relates to heating and ventilating equipment technical field more particularly to multi-online air-conditioning systems.
Background technique
Multi-online air-conditioning system is widely used in residential central air conditioning, market, work due to refrigerating capacity wide coverage
All kinds of building places such as factory, hospital.It is screw compressor that multi-online air-conditioning system, which generallys use compressor, at present.Screw compressor
Compared to centrifugal compressor, efficiency is lower.If centrifugal compressor application will be obviously improved multi-connected machine in multi-line system
The efficiency of system.The working range of multi-online air-conditioning system is wide, from -30 DEG C to 50 DEG C.Common two-stage refrigeration centrifugal compressor
Pressure ratio is usually within 5.To centrifugal compressor applications in multi-online air-conditioning system, are needed the work pressure of centrifugal compressor
Than reaching 10, this is a challenge to the design of centrifugal compressor.Centrifugal compressor applied to multi-online air-conditioning system is cold
Small, revolving speed height is measured, if bearing temperature rise and frictional dissipation can be very big using common oil-lubricated bearing, influences compressor fortune
Row reliability.
Utility model content
To improve above-mentioned technological deficiency, it includes centrifugal compressor that the utility model, which provides a kind of multi-online air-conditioning system,
Centrifugal compressor includes rotor, and the main shaft of rotor is equipped with multi-stage impeller, axial bearing and transverse bearing, axial bearing and diameter
It is gas bearing at least one of bearing.
In some embodiments, centrifugal compressor includes motor, and motor is arranged in the middle part of main shaft, multi-stage impeller along
The airintake direction of compressor is successively set on main shaft, and the motor relative to compressor is arranged symmetrically.
In some embodiments, gas bearing is selected from least one of the following: hydrodynamic gas-lubricated bearing；Pressurized air axis
It holds；Hybrid bearing.
In some embodiments, multi-stage impeller includes the multiple low-pressure stage impellers and neighbour that the air inlet of neighbouring compressor is arranged
Multiple hiigh pressure stage impellers of the exhaust outlet arrangement of nearly compressor.
In some embodiments, the impeller quantity of multiple hiigh pressure stage impellers and multiple low-pressure stage impellers is two.
In some embodiments, between motor and hiigh pressure stage impeller be equipped with the first radial air bearing, motor with it is low
It arbitrarily downgrades between impeller second radial gas bearing provided, axial thrust disk is equipped between the first radial air bearing and hiigh pressure stage impeller
With axial gas bearing.
In some embodiments, gas supplementing opening is equipped between two adjacent fan-wheels of at least one set in multi-stage impeller.
In some embodiments, gas supplementing opening is equipped between any two adjacent fan-wheel in multi-stage impeller.
In some embodiments, it is equipped with coolant flow channel between the stator of motor and the shell of compressor, comes for introducing
From the refrigerant of the refrigerant supply unit of compressor.
In some embodiments, coolant flow channel is arranged at least one of the stator of motor and the shell of compressor.
In some embodiments, coolant flow channel is helically.
In some embodiments, refrigerant supply unit includes the condenser of multi-online air-conditioning system.
In some embodiments, the gap between the rotor and stator of motor and the gap between bearing and main shaft with
Coolant flow channel is in fluid communication.
The utility model provides a kind of multi-online air-conditioning system with centrifugal compressor.Using gas suspension bearing
Technology, the problem that the temperature for improving oil-lubricated bearing under high revolving speed increases and frictional dissipation is big.By using multi-stage impeller
Compression, improves the low problem of common two-stage refrigeration compressor pressure ratio.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The illustrative embodiments and their description of the utility model are only used for explaining the utility model, do not constitute to the utility model not
Work as restriction.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the embodiments of the present invention；
Fig. 2 is the structural schematic diagram of the compressor drum in Fig. 1；
Fig. 3 is the structural schematic diagram of the refrigerant coolant flow channel in Fig. 1.
Specific embodiment
With reference to the accompanying drawings, the embodiments of the present invention are described in further detail.
As shown in Figure 1, the utility model discloses a kind of multi-online air-conditioning system with centrifugal compressor 100, in order to
Simplification only shows centrifugal compressor 100, and the other parts of multi-online air-conditioning system are not shown.
Centrifugal compressor 100 includes multi-stage impeller, axial bearing, the transverse bearing being mounted on the main shaft 101 of rotor
With the equal components of magneto 102, wherein axial bearing is that perhaps transverse bearing is gas bearing or axial axis to gas bearing
It holds and transverse bearing is all gas bearing.Gas bearing can be selected from least one of the following: hydrodynamic gas-lubricated bearing；Static pressure gas
Body bearing；Hybrid bearing.
Compared to ordinary refrigerant compressor, which uses multi-stage compression, has multi-stage impeller, such as with four
A impeller compresses for level Four.The compressor can reach higher pressure ratio, meet unit work in -30 DEG C -50 DEG C of environment
Make.The compressor uses gas bearing, compares oil-lubricated bearing, and gas bearing allows compressor to have higher revolving speed, bearing hair
Heat is small, and temperature rise is small, and bearing friction loss is small, and gas bearing compares oil-lubricated bearing, rubs small, temperature rise is low, more suitable for height
Rotor under rotary speed working.
In some embodiments, as shown in Fig. 2, centrifugal compressor 100 includes motor 102, motor 102 is arranged in main shaft
101 middle part, multi-stage impeller are successively set on main shaft 101 along the airintake direction of compressor 100, and relative to compressor
100 motor 102 is arranged symmetrically.
Hiigh pressure stage impeller and low-pressure stage impeller are respectively arranged in the both ends of main shaft 101, the air inlet of neighbouring compressor 100
The 118 multiple low-pressure stage impellers of arrangement, the exhaust outlet 119 of neighbouring compressor 100 arrange multiple hiigh pressure stage impellers, such as quantity is equal
It is two, naturally it is also possible to be other quantity.Motor 102 is located at the middle position of main shaft 101, motor 102 and hiigh pressure stage impeller
The first radial air bearing 111, second diameter between motor 102 and low-pressure stage impeller 103 and 104 are equipped between 105 and 106
To gas bearing 112, axial thrust disk 113 is equipped between the first radial air bearing 111 and hiigh pressure stage impeller 105 and 106
With axial gas bearing 114.
Low-pressure stage impeller 103 and 104 and hiigh pressure stage impeller 105 and 106 are symmetrically arranged at the both ends of motor 102, can
Make being more uniformly stressed for bearing, more evenly, while this arrangement can be most for the deformation state of rotor in the process of running
The length of the cantilever end of the reduction rotor main shaft of limits, is conducive to promote critical rotor speed.Due to the rigidity of gas bearing
Lower than oil-lubricated bearing, the promotion of critical rotor speed is difficult, which is able to ascend the reliability during working rotor.
The middle position that motor 102 is arranged in rotor can minimize rotor tip at a distance from motor, due to
Motor is driving part, applies torque to rotor, this layout type can maximally reduce the torsional deflection of rotor, mention
The torsion stiffness for rising rotor, to promote the reliability of rotor.
In some embodiments, compressor 100 is compressed using level Four and multistage tonifying Qi, compressor tonifying Qi are able to ascend pressure
The refrigeration cycle efficiency of contracting machine 100, to promote the unit efficiency of compressor.Tonifying Qi number can be one, two or three
It is a.As shown in figure 3, the first gas supplementing opening 201 is between one stage impeller 103 and sencond stage impeller 104.Connecting pipe 109 is by second level
Impeller 104 and three-level impeller 105 are in fluid communication, and the second gas supplementing opening 202 is located on connecting pipe 109, are located at sencond stage impeller 104
Between three-level impeller 105.Third gas supplementing opening 203 is between three-level impeller 105 and level Four impeller 106.It is not every two
Tonifying Qi is centainly needed between impeller, it can also be between two impellers without tonifying Qi.
Motor 102 and bearing can generate heat at work, in order to guarantee the functional reliability of motor 102 Yu bearing, need
Motor 102 is cooled down with bearing, compared to common air-cooled or water cooling, more preferably using refrigerant cooling effect.
As shown in figure 3, in some embodiments, between the stator 1021 of motor 102 and the shell 107 of compressor 100
Equipped with coolant flow channel 108, for introducing the refrigerant of the refrigerant supply unit from compressor 100.
In some embodiments, the stator 1021 of motor 102 and the shell 107 of compressor 100 is arranged in coolant flow channel 108
At least one of on.Such as coolant flow channel 108 is helically.
In some embodiments, the gap between the rotor and stator of motor 102 and between bearing and main shaft 101 between
Gap is in fluid communication with coolant flow channel 108.
Can guarantee the cooling motor 102 of refrigerant and bearing in this way, the refrigerant of cooling motor 102 come condenser or other
High-pressure liquid refrigerant enters motor helical runner after throttling set, and the outer surface of motor stator is arranged in helical flow path, protects
Card motor stator is fully cooled.The fluid of cooling bearing is carried on the back from the fluid after wheel compresses, fluid by impeller
Afterwards and the gap of gas formation flows through bearing, takes away the heat of bearing working, reduces bearing temperature.A part of fluid passes through
Gap between motor stator and rotor, cooling rotor, all fluids flow out after the outlet of motor 102 summarizes,
It completes to motor 102 and bearing cooling cycle.
The embodiment combined above is described in detail the embodiments of the present invention, but the utility model not office
It is limited to described embodiment.For a person skilled in the art, the principles of the present invention and essence are not being departed from
A variety of variations, modification, equivalence replacement and modification is carried out to these embodiments in the case where spirit to still fall in the utility model
Protection scope within.
Claims (13)
1. a kind of multi-online air-conditioning system, including centrifugal compressor (100), the centrifugal compressor (100) includes rotor,
The main shaft (101) of the rotor is equipped with multi-stage impeller, axial bearing and transverse bearing, in the axial bearing and transverse bearing
At least one be gas bearing.
2. multi-online air-conditioning system according to claim 1, which is characterized in that the centrifugal compressor (100) includes
Motor (102), the motor (102) are arranged in the middle part of the main shaft (101), and the multi-stage impeller is along the compressor
(100) airintake direction is successively set on the main shaft (101), and the motor relative to the compressor (100)
(102) it is arranged symmetrically.
3. multi-online air-conditioning system according to claim 1, which is characterized in that the gas bearing in following extremely
It is one few: hydrodynamic gas-lubricated bearing；Hydrostatic gas-lubricated bearing；Hybrid bearing.
4. multi-online air-conditioning system according to claim 2, which is characterized in that the multi-stage impeller includes the neighbouring pressure
Multiple low-pressure stage impellers of air inlet (118) arrangement of contracting machine (100) and the exhaust outlet (119) of neighbouring compressor (100)
Multiple hiigh pressure stage impellers of arrangement.
5. multi-online air-conditioning system according to claim 4, which is characterized in that the multiple hiigh pressure stage impeller (105；
And the multiple low-pressure stage impeller (103 106)；104) impeller quantity is two.
6. multi-online air-conditioning system according to claim 4, which is characterized in that in the motor (102) and the high pressure
The first radial air bearing (111) are equipped between grade impeller, the second diameter between the motor (102) and the low-pressure stage impeller
To gas bearing (112), axial thrust disk is equipped between first radial air bearing (111) and the hiigh pressure stage impeller
(113) and axial gas bearing (114).
7. any multi-online air-conditioning system in -6 according to claim 1, which is characterized in that in the multi-stage impeller
Gas supplementing opening is equipped between at least one set of two adjacent fan-wheels.
8. multi-online air-conditioning system according to claim 7, which is characterized in that any two in the multi-stage impeller
Gas supplementing opening (201 is equipped between adjacent fan-wheel；202；203).
9. multi-online air-conditioning system according to claim 2, which is characterized in that the stator in the motor (102)
(1021) coolant flow channel (108) are equipped between the shell (107) of the compressor (100), come from the compression for introducing
The refrigerant of the refrigerant supply unit of machine (100).
10. multi-online air-conditioning system according to claim 9, which is characterized in that the coolant flow channel (108) is arranged in institute
It states at least one of the stator (1021) of motor (102) and the shell (107) of the compressor (100).
11. multi-online air-conditioning system according to claim 9, which is characterized in that the coolant flow channel (108) is helically
's.
12. multi-online air-conditioning system according to claim 9, which is characterized in that the refrigerant supply unit includes described more
The condenser of online air-conditioning system.
13. multi-online air-conditioning system according to claim 9, which is characterized in that the rotor and stator of the motor (102)
Between gap and the bearing and the main shaft (101) between gap with the coolant flow channel (108) be in fluid communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822189985.3U CN209340166U (en) | 2018-12-25 | 2018-12-25 | Multi-online air-conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822189985.3U CN209340166U (en) | 2018-12-25 | 2018-12-25 | Multi-online air-conditioning system |
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| Publication Number | Publication Date |
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| CN209340166U true CN209340166U (en) | 2019-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822189985.3U Active CN209340166U (en) | 2018-12-25 | 2018-12-25 | Multi-online air-conditioning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425414A (en) * | 2020-02-27 | 2020-07-17 | 合肥通用机械研究院有限公司 | Special gas high-speed centrifugal compressor adopting gas suspension bearing |
-
2018
- 2018-12-25 CN CN201822189985.3U patent/CN209340166U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425414A (en) * | 2020-02-27 | 2020-07-17 | 合肥通用机械研究院有限公司 | Special gas high-speed centrifugal compressor adopting gas suspension bearing |
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