CN209340164U - Centrifugal compressor and air conditioning equipment - Google Patents
Centrifugal compressor and air conditioning equipment Download PDFInfo
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- CN209340164U CN209340164U CN201822189853.0U CN201822189853U CN209340164U CN 209340164 U CN209340164 U CN 209340164U CN 201822189853 U CN201822189853 U CN 201822189853U CN 209340164 U CN209340164 U CN 209340164U
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 10
- 241000239290 Araneae Species 0.000 claims description 59
- 238000007789 sealing Methods 0.000 claims description 33
- 244000126211 Hericium coralloides Species 0.000 claims description 28
- 238000009792 diffusion process Methods 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
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- 238000010586 diagram Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
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- 230000008859 change Effects 0.000 description 2
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- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000003276 anti-hypertensive effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Abstract
The utility model relates to a centrifugal compressor and air conditioning equipment, wherein, centrifugal compressor includes: a main shaft (1); one end of the diffuser (3), which is far away from the diffuser surface, is provided with a first thrust bearing (10); the supporting component (5), one end of the supporting component (5) facing the diffuser (3) is provided with a second thrust bearing (10'); and a thrust disc (4) configured to be rotatable together with the main shaft (1) and located axially between the diffuser (3) and the support assembly (5), the thrust disc (4) having a thrust portion (41), gaps between both sides of the thrust portion (41) and the first thrust bearing (10) and the second thrust bearing (10') being defined by the diffuser (3) and the support assembly (5) abutting against each other. The centrifugal compressor can accurately ensure the clearance of the thrust bearing, ensure the performance of the thrust bearing and improve the operation stability of the compressor.
Description
Technical field
The utility model relates to compressed air unit technical field more particularly to a kind of centrifugal compressors and air-conditioning equipment.
Background technique
Hydrodynamic gas-lubricated bearing is high with precision, frictional dissipation is small, the service life is long, with small vibration, pollution-free, without providing lubrication Jie
The advantages that matter, while being suitable for high revolving speed and high-precision occasion, it especially minimizes in centrifugal compressor and has in centrifugal compressor
There is broad prospect of application.But the gap of gas bearing is very small, the degree of only a few micrometers or even some tens of pm, and requires zero
The machining accuracy of part is submicron order.Therefore thrust bearing thrust face gap ensures to be very important, if gap controls
Inaccuracy can then reduce Properties of Thrust Bearings, and it will cause bearing failures when serious.
Utility model content
The purpose of this utility model is to propose a kind of centrifugal compressor and air-conditioning equipment, can be improved thrust axis in compressor
The assembly precision held.
It is according to the present utility model in a first aspect, proposing a kind of centrifugal compressor, comprising:
Main shaft；
Diffuser, diffuser are equipped with the first thrust bearing far from the one end in diffusion face；
Bearing assembly, bearing assembly are equipped with the second thrust bearing towards one end of diffuser；And thrust disc, it is configured as
It can be rotated, and be axially located between diffuser and bearing assembly together with main shaft, thrust disc has thrust portion, thrust portion two sides
Gap between the first thrust bearing and the second thrust bearing, which is abutted each other by diffuser with bearing assembly, to be defined.
Further, diffuser is equipped with the first groove far from the one end in diffusion face, and the first thrust bearing is located at the first groove
Along axial bottom, thrust portion is located in the first groove.
Further, centrifugal compressor further includes shell and transverse bearing, wherein bearing assembly includes:
Fixed plate, the second thrust bearing are located at the side in fixed plate towards diffuser；With
Bearing spider is located at side of the fixed plate far from diffuser, and the first end of bearing spider is connect with fixed plate, and second
End is connect with shell, for being supported by transverse bearing to main shaft.
Further, fixed plate and bearing spider form integral structure.
Further, fixed plate is also used to limit transverse bearing axially towards the displacement of diffuser side.
Further, fixed plate is equipped with positioning ring towards one end of bearing spider, and bearing spider is equipped with the second of annular
Groove, positioning ring are embedded in the second groove, and the outer wall of the inner wall of positioning ring and transverse bearing part length section cooperates.
Further, centrifugal compressor further includes shell and transverse bearing, wherein bearing assembly includes:
Bearing spider is connect with shell, and the second thrust bearing is located at the side on bearing spider towards diffuser, bearing branch
Seat is also used to be supported main shaft by transverse bearing.
Further, centrifugal compressor further includes shell and transverse bearing, and bearing assembly includes bearing spider, bearing spider
First end be resisted against on diffuser, second end is connect with shell, for being supported by transverse bearing to main shaft, bearing branch
Seat is gradually increased from first end to the second end section contour dimension.
Further, centrifugal compressor further includes transverse bearing, and bearing assembly includes bearing spider, for passing through radial axle
It honours main shaft to be supported, bearing spider is equipped with venthole, for making the working environment and the first thrust bearing of transverse bearing
It is consistent with the second thrust bearing.
Further, the first thrust bearing is directly anchored to the bottom of the first groove.
Further, centrifugal compressor further includes impeller and locking member, and cavity is equipped in main shaft and is equipped at center
The end of main shaft is stretched out in central spindle, the end of central spindle；Impeller is set in the outer end of central spindle, and is locked at impeller by locking member
In central spindle, and impeller is located at the outside of diffuser.
Further, thrust disc further includes interconnecting piece, and interconnecting piece is connect with thrust portion, and is set on main shaft, and first is recessed
The bottom of slot is equipped with through-hole, and interconnecting piece is embedded in through-hole.
Further, centrifugal compressor further includes the impeller for being located at spindle nose, and impeller is located at the outside of diffuser,
Through-hole side wall is equipped with first axis comb tooth sealing structure；And/or
Impeller is equipped with radial comb tooth sealing structure towards the end of diffuser；And/or
Impeller has the embedded division in insertion diffuser, is equipped with the second axial labyrinth seal knot on embedded division along its length
Structure.
Further, first axis comb tooth sealing structure, radial comb tooth sealing structure and the second axial comb tooth sealing structure
It is arranged simultaneously, and radial comb tooth sealing structure is radially positioned at first axis comb tooth sealing structure and the second axial labyrinth seal knot
Between structure.
Further, centrifugal compressor further includes for the transverse bearing to supports main shaft, and the first thrust bearing, second push away
Power bearing and/or transverse bearing are gas suspension bearing.
Second aspect according to the present utility model proposes a kind of air-conditioning equipment, the centrifugal compressor including above-described embodiment.
Based on the above-mentioned technical proposal, the thrust bearing of the centrifugal compressor of the utility model embodiment, thrust disc and two sides
Cooperation, can bear the axial force of left and right both direction, to guarantee stability of the compressor when full working scope is run and inverts operation；
It is combined limit moreover, abutting each other by bearing assembly and diffuser, the position of thrust disc can be limited, and definitely define
Thus gap between thrust disc and two sides thrust bearing can reduce assembly difficulty, improve assembly efficiency and assembly precision, and protect
The working performance of thrust bearing is demonstrate,proved, compressor operation stability is improved.
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 exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of one embodiment of the utility model centrifugal compressor；
Fig. 2 is the mounting structure schematic diagram of diffuser, thrust disc and fixed plate in the utility model centrifugal compressor；
Fig. 3 is that the mounting structure of diffuser in the utility model centrifugal compressor, thrust disc, fixed plate and bearing spider shows
It is intended to；
Fig. 4 is the schematic diagram that fixed plate and bearing spider use integral structure in the utility model centrifugal compressor；
Fig. 5 is the mounting structure schematic diagram of the utility model centrifugal compressor middle (center) bearing support and shell；
Fig. 6 is the structural schematic diagram of one embodiment of sealing structure in the utility model centrifugal compressor.
Description of symbols
1, main shaft；2, impeller；3, diffuser；4, thrust disc；5, bearing assembly；6, shell；7, stator module；8, radial axle
It holds；9, locking member；10, the first thrust bearing；10 ', second thrust bearing；
11, cavity；12, central spindle；13, magnet steel；21, radial comb tooth sealing structure；22, embedded division；23, the second axial comb teeth
Sealing structure；31, the first groove；32, fastener；33, positioning spigot；34, through-hole；35, first axis comb tooth sealing structure；
41, thrust portion；42, interconnecting piece；51, fixed plate；511, positioning ring；512, inner wall；52, bearing spider；521, the second groove；
522, mounting hole；523, handle hole；524, weight loss groove；525, ring flange；526, venthole；527, seam allowance；61, the first spiral case；
62, middle casing；63, the second spiral case.
Specific embodiment
The utility model described further below.In the following paragraphs, the different aspect of embodiment is defined in more detail.
The various aspects so limited can be combined with any other one aspect or many aspects, can not be combined unless explicitly stated otherwise.Especially
It is, it is considered to be preferred or advantageous any feature can be considered as preferred or advantageous spy with other one or more
Sign combination.
The terms descriptions merely for convenience such as " first " that occurs in the utility model, " second ", with distinguish have it is identical
The different building blocks of title are not offered as successive or primary-slave relation.
The utility model provides a kind of centrifugal compressor, practical in order to more clearly understand those skilled in the art
Novel improvement first combines Fig. 1 to be illustrated the overall structure of centrifugal compressor.
As shown in Figure 1, by taking two-stage centrifugal compressor as an example, including the first spiral case 61, the second spiral case 63 and middle casing
62, the first spiral case 61 and the second spiral case 63 is respectively set along axial both ends in middle casing 62, and compressor housing 6 is collectively formed.
Main shaft 1 is located at the center of compressor housing, and an impeller 2 is respectively set in the both ends of main shaft 1, and the inner end of impeller 2, which is arranged, to be expanded
Depressor 3, when 2 high speed rotation of impeller, gas is with rotation, and under the action of the centrifugal force, gas, which is thrown in rear diffuser 3, to be expanded
The speed that impeller 2 exports medium can be converted pressure energy by pressure, and the gas after pressure improves is discharged from spiral case.
In order to be supported to main shaft 1, the both ends of main shaft 1 are respectively equipped with transverse bearing 8, and transverse bearing 8 passes through bearing branch
Seat 52 is supported, and bearing spider 52 is connected between on shell 62.Stator module is equipped between main shaft 1 and middle casing 62
7.Since impeller 2 can generate axial force during the work time, thrust bearing is set in one end of main shaft 1, to balance impeller
2 axial forces generated.
The working principle of such compressor are as follows: 1 high speed rotation of main shaft in compressor operation, gas pass through left side
Impeller 2 enters in diffuser 3, and gas enters in the first spiral case 61 after one stage of compression, the exhaust passage on the first spiral case 61
Compressed gas is guided to entering in the impeller 2 of right side, is entered in right side diffuser 3 after the centrifugal action of right side impeller 2, gas
Body enters in the second spiral case 63 after two-stage compression, and compressor is discharged by the exhaust passage on the second spiral case 63.
Next the bearing bearing assembly in centrifugal compressor will be described in detail, in some embodiments, such as Fig. 2
Shown, centrifugal compressor includes: main shaft 1, impeller 2, diffuser 3, thrust disc 4 and bearing assembly 5.
Wherein, the centre of main shaft 1 can be equipped with magnet steel 13, and diffuser 3 is fixed on shell 6, and diffuser 3 is far from diffusion face
One end is equipped with the first thrust bearing 10, and diffusion face is close to the end face of impeller 2.Bearing assembly 5 is located at diffuser 3 far from diffusion
The shell 6 of the one end in face, one end and compressor is fixed, and the other end is resisted against on the end face of diffuser 3,5 direction of bearing assembly
The side of diffuser 3 is equipped with the second thrust bearing 10 '.Thrust disc 4 is configured as to rotate together with main shaft 1, and thrust disc 4 has
Thrust portion 41, for example, by using disk-like structure, and the two sides of thrust portion 41 and the first thrust bearing 10 and the second thrust bearing 10 ' it
Between gap abut each other and be defined with bearing assembly 5 by diffuser 3.41 or so two sides of thrust portion and two sides thrust bearing
Working face is formed, bidirectional axial force can be born, guarantees to run reliability when the operation of compressor full working scope and reversion.
For example, the first thrust bearing 10 and the second thrust bearing 10 ' can be static pressure or kinetic pressure gas thrust bearing, or
It is also possible to magnetic suspension bearing.
By taking Fig. 2 as an example, due to there is gap between thrust bearing and thrust disc 4, gas can have pressure by interior formed in this gap
The air film of power plays thrust and lubricating action, and since thrust bearing is inherently in compressor chamber body, gas just carrys out cavity environment,
In rotor rotation process, gas can be brought into gap, form kinetic pressure gas thrust bearing.
In the centrifugal compressor of the embodiment, thrust disc can cooperate with the thrust bearing of two sides, can bear two sides in left and right
To axial force, with guarantee compressor full working scope run and invert operation when stability.Compressor operating condition is finger pressure
The evaporating temperature and condensation temperature of system, full working scope refer to compressor in certain evaporating temperature range and condensation temperature where contracting machine
Work in range, when compressor shutdown, since pressure at expulsion is higher than pressure of inspiration(Pi), it may appear that Reversion after shutdown.
Moreover, because diffuser 3 and bearing assembly 5 are required to be fixed on the shell 6 of compressor, therefore self-position
It is fixed, it is abutted each other by bearing assembly 5 and diffuser 3 and is combined limit, define the position and and two sides of thrust disc 4
Thus gap between thrust bearing can accurately guarantee thrust bearing gap, reduce assembly difficulty, improve assembly efficiency and assembly
Precision, and guarantee the working performance of thrust bearing, to improve the operation stability of compressor.
As shown in Fig. 2, diffuser 3 is equipped with the first groove 31 far from the one end in diffusion face, the first groove 31 is along axial bottom
Portion is equipped with the first thrust bearing 10, and thrust portion 41 is located in the first groove 31, and the two sides of thrust portion 41 and the first thrust bearing
10 and second all have gap between thrust bearing 10 '.
Since diffuser 3 and bearing assembly 5 abut each other, two can be accurately insured that by the axial depth of the first groove 31
The gap of side-thrust bearing can be improved assembly precision, and reduce assembly difficulty, improve assembly efficiency, while also ensuring thrust
The performance of bearing prevents gap control inaccuracy from Properties of Thrust Bearings being caused to reduce and even fails, to improve the fortune of compressor
Row stability.
As shown in Fig. 2, the depth of the first groove 31 includes: 41 thickness of thrust portion, the thickness of two sides thrust bearing and two sides
It the gap of thrust bearing therefore, can be by improving 31 depth of the first groove, thrust in order to guarantee the gap of two sides thrust bearing
The thickness of 41 thickness of portion and two sides thrust bearing controls gap.Method particularly includes: gap to be achieved is needed according to thrust bearing
Range, 41 thickness deviation range of thrust portion and thrust bearing thickness deviation range, come the anti-projected depth for pushing away the first groove 31 and
The margin of tolerance.It can guarantee thrust bearing gap by improving the machining accuracy of 31 depth of the first groove as a result, assembly can be improved
Precision, and assembly difficulty is reduced, to improve assembly efficiency.
In some embodiments, as shown in Figures 2 and 3, centrifugal compressor further includes shell 6 and transverse bearing 8, is used for
The radial force for carrying rotor, mainly from the gravity of rotor itself.For example, transverse bearing 8 can be static pressure or kinetic pressure gas diameter
To bearing, or it is also possible to magnetic suspension bearing.
Bearing assembly 5 includes fixed plate 51 and bearing spider 52.Wherein, fixed plate 51 is resisted against on diffuser 3, and second pushes away
Power bearing 10 ' is located in fixed plate 51 towards the side of diffuser 3；Bearing spider 52 is located at fixed plate 51 far from diffuser 3
The first end of side, bearing spider 52 is connect with fixed plate 51, and second end is connect with shell 6, for right by transverse bearing 8
Main shaft 1 is supported.
Bearing assembly 5 in the embodiment adopts a split structure, and installs the second thrust bearing 10 ' by fixed plate 51,
Bearing spider 52 installs transverse bearing 8, is conducive to improve the transverse bearing 8 at 1 both ends of main shaft and the installation site of thrust bearing
Precision, the verticality of concentricity and thrust bearing including two transverse bearings 8, can be improved the operation is stable of rotor-support-foundation system
Property.
Specifically, as shown in figure 5, can realize in the following way.The second end of bearing spider 52 is equipped with ring flange 525,
And it is equipped with seam allowance 527 in the outer end of ring flange 525, bearing spider 52 is mounted in middle casing 62 by ring flange 525, and
It is fixed by fastener, meanwhile, bearing spider 52 carries out radial positioning by seam allowance 527.
In processing, two bearing spiders 52 are first subjected to the first reorientation by seam allowance 527 and are cooperated with middle casing 62,
Then by fastener that ring flange 525 and middle casing 62 is fixed, then beat pin and fix.Then, by middle casing 62 and two
Component positions bearing spider 52 on process equipment as a whole, processes the end of two bearing spiders 52 and the cooperation of fixed plate 51
Face, to guarantee the verticality of thrust bearing Yu transverse bearing 8, then the successively mounting hole of two bearing spiders 52 of processing from side
522, to guarantee the concentricity of two transverse bearings 8.
After completion of processing, bearing spider 52 is removed, and transverse bearing 8 is packed into bearing spider by way of hot charging
52 mounting hole 522, then fixed plate 51 is mounted on to the first end of bearing spider 52.Bearing spider 52 can pass through true when processing
Fixed pin location is fixedly mounted on shell 6.
Since the position portion of each key completes processing in a clamping process, it can guarantee two transverse bearings 8
Concentricity and thrust bearing verticality, to improve the job stability of rotor-support-foundation system.
As shown in figure 3, fixed plate 51 is also used to limit transverse bearing 8 axially towards the displacement of 3 side of diffuser, by
This, fixed plate 51 can install the second thrust bearing 10 ' and carry out axial limiting to transverse bearing 8, can make bearing support group
The structure of part is more compact, and is conducive to guarantee 10 ' mounting surface of the second thrust bearing by the processing depth of parallelism of 51 two sides of fixed plate
With the depth of parallelism in 8 axial limiting face of transverse bearing, to improve the installation accuracy of thrust bearing Yu transverse bearing 8.
Further, fixed plate 51 is equipped with positioning ring 511 towards one end of bearing spider 52, and bearing spider 52 is equipped with ring
Second groove 521 of shape, positioning ring 511 are embedded in the second groove 521, to carry out radial positioning, fixed plate 51 to fixed plate 51
There is gap between main shaft 1.Moreover, the inner wall of positioning ring 511 is matched with the outer wall of 8 partial-length section of transverse bearing, it is used for
The partial-length section of transverse bearing 8 is supported, while playing the role of axial thrust to transverse bearing 8.
In a kind of specific structure, as shown in Fig. 2, the first thrust bearing 10 is fixed on diffuser 3 by fastener 32
On, the second thrust bearing 10 ' is fixed in fixed plate 51 by fastener 32, and fixed plate 51 is abutted each other with diffuser 3, diffusion
The periphery of device 3 be equipped with positioning spigot 33, so as to 6 location and installation of shell.
In some embodiments, as shown in figure 4, fixed plate 51 and bearing spider 52 form integral structure.Bearing assembly 5 is adopted
Structure can be simplified with integral structure, reduce assembly difficulty, and be easy to guarantee transverse bearing by the machining accuracy of bearing assembly 5
8 with the verticality of thrust bearing.
In some embodiments, it is not shown in the figure, centrifugal compressor further includes shell 6 and transverse bearing 8, wherein bearing
Component 5 includes bearing spider 52, and the first end of bearing spider 52 is resisted against on diffuser 3, and second end is connect with shell 6, and second
Thrust bearing 10 ' is located on bearing spider 52 towards the side of diffuser 3, and bearing spider 52 is also used to right by transverse bearing 8
Main shaft 1 is supported.Bearing spider 52 reserves thrust platform in processing mounting holes 522, to carry out axial limit to transverse bearing 8
Position.
Compared with embodiment illustrated in fig. 4, fixed plate 51 is eliminated, the axial ruler of bearing bearing assembly can be further decreased
It is very little, moreover it is possible to simplify structure, reduce assembly difficulty, and be easy to guarantee transverse bearing 8 and thrust by the machining accuracy of bearing assembly 5
The verticality of bearing.
As shown in Figure 3 and Figure 4, centrifugal compressor further includes shell 6 and transverse bearing 8, and bearing assembly 5 includes bearing spider
52, the first end of bearing spider 52 is resisted against on diffuser 3, and second end is connect with shell 6, for passing through 8 couples of masters of transverse bearing
Axis 1 is supported.Since the outer diameter of thrust bearing is less than 6 internal diameter of shell, correspondingly, bearing spider 52 is from first end to second
End section contour dimension is gradually increased.It in order to reduce the weight, as shown in figure 5, can also be in side of the bearing spider 52 far from thrust bearing
Weight loss groove 524, such as 524 annular setting of weight loss groove are set, and inner wall is parallel with axis, the outline shape of outer wall and bearing spider 52
Unanimously.
The overall structure of bearing spider 52 can be improved by using the structure of sectional area gradual change in such V-arrangement bearing spider 52
Intensity, distribution of force is uniform everywhere, can optimize bearing capacity, and lateral wall is that inclined-plane is easy to realize by casting, passes through mould
There is pattern draft when tool is cast.
Further, as shown in figure 5, bearing spider 52 is equipped with venthole 526, for making the building ring of transverse bearing 8
Border and the first thrust bearing 10 and the second thrust bearing 10 ' unanimously, such as make the operating back pressure and the first thrust axis of transverse bearing 8
It is consistent with the second thrust bearing 10 ' to hold 10.There is the refrigerant of cooling motor to pass in and out in motor cavity, it is whole when compressor operates normally
Body motor cavity pressure and temperature be it is stable, thrust bearing and transverse bearing working environment are identical as motor cavity, that is, guarantee
Gas circulation, and back pressure is relatively stable, if back-pressure surges are too big, will cause the fluctuation of bearing air film, influences bearing performance.
As shown in figure 3, being equipped with handle hole 523 on bearing spider 52, radially will pass through handle hole 523 in transverse bearing
Vibrating sensor or temperature sensor are installed, to monitor the working condition of transverse bearing 8 on 8 outer wall.Handle hole 523 is along diameter
Hole section outward can be used as by-pass prot, guarantee that thrust bearing and transverse bearing 8 and motor cavity pressure and temp are all identical, handle hole
523 radially inside hole section play the role of give transverse bearing 8 radiate.
In some embodiments, as shown in figure 3, the first thrust bearing 10 is directly anchored to the first groove 31 of diffuser 3
Bottom.For example, the first thrust bearing 10 uses Hydrodynamic Thrust Bearings, it is flake structure, which can directly fix
In 31 bottom of the first groove.Diffuser 3 and thrust bearing fixed plate are integrated into a part by such structure, and it is recessed to can be used first
Fixed plate of the bottom of slot 31 as the first thrust bearing 10 can be further decreased without additional setting thrust bearing fixed plate
The axial dimension of bearing bearing assembly keeps structure more compact.
In some embodiments, it as shown in Figure 1, centrifugal compressor further includes impeller 2 and locking member 9, is equipped in main shaft 1
Cavity 11 is simultaneously equipped with central spindle 12 at center, and the end of main shaft 1 is stretched out in the end of central spindle 12；Impeller 2 is set in the outer of central spindle 12
End, and impeller 2 is locked in central spindle 12 by locking member 9, and impeller 2 is located at the outside of diffuser 3.
The embodiment is removably disposed impeller 2 relative to main shaft 1, can reduce dismounting impeller difficulty, and simplify impeller
Assembly technology and required equipment, improve assembly efficiency and open and inspect the operability of work and maintenance.Moreover, such installation side
Formula can prevent main shaft or impeller from deforming, and also can guarantee impeller installation strength, avoid generating stress concentration, to promote pressure
The compressed capability of contracting machine.In addition, can reduce main shaft weight by the way that cavity is arranged on main shaft, to improve the critical speed of rotor,
Further improve the maximal work ability of compressor.
Still referring to FIG. 1, central spindle 12 makes the rest part of central spindle 12 Yu main shaft 1 by directly being formed when processing cavity 11
Processing forms one, it is not necessary that central spindle 12 to be additionally installed in the cavity of main shaft 1, can further decrease assembly difficulty, increase axis
The bonding strength of core 12 and main shaft 1, it is also ensured that the position precision of central spindle 12 effectively solves the tripping problems of rotor front end, subtracts
Few cantilever end length, to improve the job stability and reliability of compressor.For example, cavity 11 can be annular groove, Huo Zheduo
It is a relative to the symmetrical hole of axis centre.
As shown in figure 3, thrust disc 4 further includes interconnecting piece 42, thrust disc 4 is connect with thrust portion 41, and is set in main shaft 1
On, the bottom of the first groove 31 is equipped with through-hole 34, and interconnecting piece 42 is embedded in through-hole 34.Interconnecting piece 42 can match with 1 interference of main shaft
It closes, so that thrust disc 4 can be rotated together with main shaft 1.Diffuser 3 and fixed plate 51 are fixedly installed, and all have between main shaft 1
Gap.For example, thrust disc 4 can be cylinder ladder-type structure.
As shown in fig. 6, centrifugal compressor further includes the impeller 2 for being located at 1 end of main shaft, impeller 2 is located at the outer of diffuser 3
Side, the side wall of through-hole 34 are equipped with first axis comb tooth sealing structure 35, form axle envelope with thrust disc 4, can reduce refrigerant with
Impeller exhaust enters motor cavity by the gap of diffuser 3 and thrust disc 4.And/or the end of impeller 2 towards diffuser 3 is equipped with
Radial comb tooth sealing structure 21 can reduce refrigerant along the outside Zhou Liudong in gap between impeller 2 and diffuser 3.And/or leaf
Wheel 2 has the embedded division 22 in insertion diffuser 3, for example, embedded division 22 can be the elongated strip structure axially extended, it is embedding
Enter and be equipped with the second axial comb tooth sealing structure 23 in radially inner side along its length in portion 22, refrigerant can be reduced along impeller
The outside Zhou Liudong in gap between 2 and diffuser 3.
Specifically, the inclined-plane of comb teeth is tilted from high side to low side, and can be trapezoidal by the top of comb teeth.
The embodiment can reduce the leakage of the refrigerant between impeller 2 and diffuser 3, between diffuser 3 and thrust disc 4
Amount not only can guarantee the gap needed when main shaft 1 and impeller 2 operate, but also can prevent from leaking because of refrigerant caused by gap is excessive, have
Effect ground solves the problems, such as compressor seal, is conducive to promote compressor efficiency.
Moreover, diffuser 3, thrust bearing fixed plate and axle envelope part are integrated into a part by such structure, peace can be simplified
Assembling structure makes more compact structure, and improves assembly efficiency.As shown in Fig. 2, the periphery of diffuser 3 is equipped with positioning spigot 33, with
Just with 6 location and installation of shell, then pin is cooperated to be accurately positioned.As a result, on diffuser axle envelope part concentricity and thrust bearing
The verticality of stationary plane all guarantees on one part, not only reduces difficulty of processing, while being greatly reduced assembly accumulation mistake
The axle envelope for requiring high-axiality and the thrust bearing for requiring high verticality are shared positioning spigot 33 and pin are determined by difference
Position, unified reference for assembling, reduces assembly difficulty, and improve assembly precision, can improve the verticality of thrust bearing stationary plane, with
Guarantee the working performance of thrust bearing, moreover it is possible to which the concentricity for improving first axis comb tooth sealing structure 35 prevents comb teeth from grinding
It damages and influences sealing performance.
The material of diffuser 3 wants the hardness of specific thrust disk 4 low in terms of material selection, the optional aluminium of general diffuser 3, thrust
Optional 45 steel of disk or 40Cr etc..In this way if the first axis comb tooth sealing structure 35 on diffuser 3 is worn with main shaft 1,
Then comb teeth is first worn, to prevent main shaft 1 from wearing.
Still referring to FIG. 6, first axis comb tooth sealing structure 35, radial comb tooth sealing structure 21 and the second axial comb teeth are close
Seal structure 23 is arranged simultaneously, and radial comb tooth sealing structure 21 is radially positioned at first axis comb tooth sealing structure 35 and the second axis
To between comb tooth sealing structure 23.Such set-up mode can make air-flow form the flow path of detour, and optimization airflow, which slows down, to drop
Effect is pressed, sealing performance is improved.
Specifically, impeller 2 is equipped with boss towards one end of diffuser 3, and boss protrudes into the groove of diffuser 3, radial to comb
Tooth sealing structure 21 is located at the end of boss, excellent further to extend gas flow paths while realizing radial seal
Change flow slowing down antihypertensive effect, improves sealing performance.
In addition, the utility model additionally provides a kind of air-conditioning equipment, the centrifugal compressor including above-described embodiment.This is practical
Novel centrifugal compressor can bear the axial force of both direction, guarantee operation stability when the operation of compressor full working scope and reversion；
And can accurately guarantee the fit-up gap of thrust bearing, guarantee the performance of thrust bearing, to improve the stable of compressor
Property.The two factors can improve the stability and reliability of air-conditioning equipment work.
A kind of centrifugal compressor provided by the utility model and air-conditioning equipment are described in detail above.Herein
It applies specific embodiment to be expounded the principles of the present invention and embodiment, the explanation of above embodiments is
It is used to help understand the method and its core concept of the utility model.It should be pointed out that for the ordinary skill people of the art
For member, without departing from the principle of this utility model, several improvements and modifications can be made to this utility model, this
A little improvement and modification are also fallen into the protection scope of the utility model claims.
Claims (16)
1. a kind of centrifugal compressor characterized by comprising
Main shaft (1)；
Diffuser (3), the diffuser (3) are equipped with the first thrust bearing (10) far from the one end in diffusion face；
Bearing assembly (5), the bearing assembly (5) are equipped with the second thrust bearing (10 ') towards one end of the diffuser (3)；
And
Thrust disc (4), be configured as with the main shaft (1) together can be rotated, and be axially located in the diffuser (3) with it is described
Between bearing assembly (5), the thrust disc (4) has thrust portion (41), thrust portion (41) two sides and first thrust
Gap between bearing (10) and the second thrust bearing (10 ') by the diffuser (3) and bearing assembly (5) abut each other into
Row limits.
2. centrifugal compressor according to claim 1, which is characterized in that the one end of the diffuser (3) far from diffusion face
Equipped with the first groove (31), first thrust bearing (10) is located at first groove (31) along axial bottom, described to push away
Power portion (41) is located in first groove (31).
3. centrifugal compressor according to claim 1, which is characterized in that it further include shell (6) and transverse bearing (8),
In, the bearing assembly (5) includes:
Fixed plate (51), second thrust bearing (10 ') are located at the side on the fixed plate (51) towards diffuser (3)；
With
Bearing spider (52) is located at the side of the fixed plate (51) far from the diffuser (3), the bearing spider (52)
First end is connect with the fixed plate (51), and second end is connect with the shell (6), for right by the transverse bearing (8)
The main shaft (1) is supported.
4. centrifugal compressor according to claim 3, which is characterized in that the fixed plate (51) and the bearing spider
(52) integral structure is formed.
5. centrifugal compressor according to claim 3, which is characterized in that the fixed plate (51) is also used to limit the diameter
To bearing (8) axially towards the displacement of the diffuser (3) side.
6. centrifugal compressor according to claim 5, which is characterized in that the fixed plate (51) is towards the bearing spider
(52) one end is equipped with positioning ring (511), and the bearing spider (52) is equipped with the second groove (521) of annular, the positioning
Ring (511) is embedded in second groove (521), and the inner wall (512) of the positioning ring (511) and the transverse bearing (8)
The outer wall of partial-length section cooperates.
7. centrifugal compressor according to claim 1, which is characterized in that it further include shell (6) and transverse bearing (8),
In, the bearing assembly (5) includes:
Bearing spider (52) is connect with the shell (6), and second thrust bearing (10 ') is located at the bearing spider (52)
On towards diffuser (3) side, the bearing spider (52) is also used to through the transverse bearing (8) to the main shaft (1)
It is supported.
8. centrifugal compressor according to claim 1, which is characterized in that further include shell (6) and transverse bearing (8), institute
Stating bearing assembly (5) includes bearing spider (52), and the first end of the bearing spider (52) is resisted against on the diffuser (3),
Second end is connect with the shell (6), for being supported by the transverse bearing (8) to the main shaft (1), the bearing
Support (52) is gradually increased from first end to the second end section contour dimension.
9. centrifugal compressor according to claim 1, which is characterized in that further include transverse bearing (8), the bearing assembly
It (5) include bearing spider (52), for being supported by the transverse bearing (8) to the main shaft (1), the bearing spider
(52) be equipped with venthole (526), for make the transverse bearing (8) working environment and first thrust bearing (10) and
Second thrust bearing (10 ') is consistent.
10. centrifugal compressor according to claim 1, which is characterized in that further include impeller (2) and locking member (9), institute
It states and is equipped with cavity (11) in main shaft (1) and is equipped with central spindle (12) at center, the main shaft is stretched out in the end of the central spindle (12)
(1) end；The impeller (2) is set in the outer end of the central spindle (12), and passes through the locking member (9) for the impeller
(2) it is locked on the central spindle (12), and the impeller (2) is located at the outside of the diffuser (3).
11. centrifugal compressor according to claim 2, which is characterized in that first thrust bearing (10) is directly fixed
In the bottom of first groove (31).
12. centrifugal compressor according to claim 2, which is characterized in that the thrust disc (4) further includes interconnecting piece
(42), the interconnecting piece (42) connect with the thrust portion (41), and is set on the main shaft (1), first groove
(31) bottom is equipped with through-hole (34), and the interconnecting piece (42) is embedded in the through-hole (34).
13. centrifugal compressor according to claim 12, which is characterized in that further include being located at the main shaft (1) end
Impeller (2), the impeller (2) are located at the outside of the diffuser (3),
Through-hole (34) side wall is equipped with first axis comb tooth sealing structure (35)；And/or
The impeller (2) is equipped with radial comb tooth sealing structure (21) towards the end of the diffuser (3)；And/or
The impeller (2) has an embedded division (22) being embedded in the diffuser (3), on the embedded division (22) along its length
Equipped with the second axial comb tooth sealing structure (23).
14. centrifugal compressor according to claim 13, which is characterized in that the first axis comb tooth sealing structure
(35), radial comb tooth sealing structure (21) and the second axial comb tooth sealing structure (23) are arranged simultaneously, and the radial comb teeth is close
Seal structure (21) be radially positioned at the first axis comb tooth sealing structure (35) and the second axial comb tooth sealing structure (23) it
Between.
15. centrifugal compressor according to claim 1, which is characterized in that further include for the support main shaft (1)
Transverse bearing (8), first thrust bearing (10), the second thrust bearing (10 ') and/or the transverse bearing (8) are outstanding for gas
Floating axle is held.
16. a kind of air-conditioning equipment, which is characterized in that including any centrifugal compressor of claim 1~15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822189853.0U CN209340164U (en) | 2018-12-25 | 2018-12-25 | Centrifugal compressor and air conditioning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822189853.0U CN209340164U (en) | 2018-12-25 | 2018-12-25 | Centrifugal compressor and air conditioning equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209340164U true CN209340164U (en) | 2019-09-03 |
Family
ID=67758878
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822189853.0U Active CN209340164U (en) | 2018-12-25 | 2018-12-25 | Centrifugal compressor and air conditioning equipment |
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| Country | Link |
|---|---|
| CN (1) | CN209340164U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120411A (en) * | 2019-12-20 | 2020-05-08 | 珠海格力电器股份有限公司 | Cooling control device, magnetic suspension system and cooling control method thereof |
| WO2020134433A1 (en) * | 2018-12-25 | 2020-07-02 | 珠海格力电器股份有限公司 | Centrifugal compressor and air conditioning apparatus |
| CN111536055A (en) * | 2020-04-30 | 2020-08-14 | 北京动力机械研究所 | High-efficient compressor arrangement of inert gas mixture bearing |
| US11578753B2 (en) * | 2018-12-25 | 2023-02-14 | Gree Electric Appliances, Inc. Of Zhuhai | Bearing supporting assembly and machining method thereof, and centrifugal compressor |
-
2018
- 2018-12-25 CN CN201822189853.0U patent/CN209340164U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020134433A1 (en) * | 2018-12-25 | 2020-07-02 | 珠海格力电器股份有限公司 | Centrifugal compressor and air conditioning apparatus |
| US11578753B2 (en) * | 2018-12-25 | 2023-02-14 | Gree Electric Appliances, Inc. Of Zhuhai | Bearing supporting assembly and machining method thereof, and centrifugal compressor |
| US11608833B2 (en) | 2018-12-25 | 2023-03-21 | Gree Electric Appliances, Inc. Of Zhuhai | Centrifugal compressor and air conditioning equipment |
| CN111120411A (en) * | 2019-12-20 | 2020-05-08 | 珠海格力电器股份有限公司 | Cooling control device, magnetic suspension system and cooling control method thereof |
| CN111536055A (en) * | 2020-04-30 | 2020-08-14 | 北京动力机械研究所 | High-efficient compressor arrangement of inert gas mixture bearing |
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