CN110439826A - Centrifugal compressor - Google Patents
Centrifugal compressor Download PDFInfo
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- CN110439826A CN110439826A CN201910716612.3A CN201910716612A CN110439826A CN 110439826 A CN110439826 A CN 110439826A CN 201910716612 A CN201910716612 A CN 201910716612A CN 110439826 A CN110439826 A CN 110439826A
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- side wall
- channel
- arcwall face
- return
- partition
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- 238000009792 diffusion process Methods 0.000 claims abstract description 48
- 238000005192 partition Methods 0.000 claims abstract description 35
- 238000010992 reflux Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 15
- 230000008676 import Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of centrifugal compressor provided by the invention, including impeller, diffuser and return channel, diffuser includes cover board and partition, and cover board is installed on return channel and forms accommodating chamber between return channel, and partition is contained in accommodating chamber and accommodating chamber is separated into the air-supply passage being connected to air inlet；Air-supply passage includes diffusion channel, commutation channel and return flow line；Channel commutate with opposite the first side wall and second sidewall, the inner sidewall of cover board is arranged in the first side wall, the lateral wall of partition is arranged in second sidewall, the first side wall includes the first arcwall face, the second arcwall face and the first plane, first plane is arranged between the first arcwall face and the second arcwall face, second sidewall includes third arcwall face and the 4th arcwall face, the program is compared with the existing technology, gas in diffusion channel is smoothly transitted into return flow line, and gas is avoided to be flowed into the loss that return flow line gas flows from diffusion channel.
Description
Technical field
The present invention relates to centrifugal compressor technical fields, in particular to a kind of centrifugal compressor.
Background technique
Centrifugal compressor is also known as runoff centrifugal compressor, is mainly used to convey air, various process gas or mixed gas,
And improve its pressure.Multistage centrifugal compressor generally comprise main shaft, one stage impeller, level-one cover board, level-one diffuser, return channel,
Sencond stage impeller, second level cover board, second level diffuser etc..When centrifugal compressor works, main shaft drives one stage impeller rotation, comes from air inlet
The gas of room is thrown in the level-one diffusion channel formed by level-one cover board and level-one diffuser by one stage impeller, and gas passes through level-one
Behind diffusion channel, the air inlet runner in front of sencond stage impeller is entered through return channel；Sencond stage impeller is equally driven by main shaft and rotates, and comes from
The gas of air inlet runner is thrown to the second level diffusion channel formed by second level cover board and second level diffuser by sencond stage impeller, in this process
In, gas is gradually compressed, to have very high pressure.In centrifugal compressor, the effect of return channel is water conservancy diversion, guidance
What is flowed out from level-one diffusion channel curls up air-flow by force with circumferential direction or specific direction evenly into next stage impeller.
Gas undergoes half-turn to enter in return flow line in diffusion channel, finally by entering next stage impeller,
Currently, the flox condition in bend and return channel is relatively poor, cause the flow losses of gas relatively large.
Summary of the invention
A kind of centrifugal compressor provided by the invention, for solving the flox condition in bend and return channel in the prior art
Technical problem that is relatively poor, causing the flow losses of gas relatively large.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme:
A kind of centrifugal compressor, including impeller, diffuser and return channel, the impeller be installed on the diffuser into
Air port；The diffuser includes cover board and partition, and the cover board is installed on the return channel and the shape between the return channel
At accommodating chamber, the partition is contained in the accommodating chamber and the accommodating chamber is separated into one and is connected to the air inlet
Air-supply passage；The air-supply passage includes diffusion channel, commutation channel and return flow line, the diffusion channel and the air inlet
Mouth connection, the commutation channel are set between the diffusion channel and return flow line；The commutation channel has opposite first
The inner sidewall of the cover board is arranged in side wall and second sidewall, the first side wall, and the second sidewall is arranged in the partition
Lateral wall, the first side wall includes the first arcwall face, the second arcwall face and the first plane, and first plane setting exists
Between first arcwall face and second arcwall face, the second sidewall includes third arcwall face and the 4th arcwall face.
It is provided with flow-guiding channel between the diffusion channel and the outlet of the impeller in one of the embodiments, institute
Flow-guiding channel is stated with opposite third side wall and the 4th side wall, the third side wall is arranged in the cover board, the 4th side
Wall setting and the partition, the third side wall are opened from outside the diffusion channel to the impeller direction.
The angular range between three side wall and vertical direction is 1 ° -15 ° in one of the embodiments,.
The width in the diffusion channel is the flow-guiding channel towards described impeller one end in one of the embodiments,
0.75~1.0 times of width.
In one of the embodiments, the return flow line have opposite the 5th side wall and the 6th side wall, the described 5th
Side wall setting is arranged in the partition, the 6th side wall in the return channel, and the 5th side wall is along the return flow line
The export direction of import to the return flow line is gradually flared out, and the angular range between vertical direction is 1 ° -10 °.
The return channel offers air outlet in one of the embodiments, the air outlet and the return flow line it
Between be provided with flow pass, the flow pass has opposite heptalateral wall and the 8th side wall, and the heptalateral wall, which is arranged, to exist
The partition, in the return channel, the heptalateral wall includes the 5th arcwall face, the 8th side wall for the 8th side wall setting
Including the 6th arcwall face.
The 5th arcwall face and the 5th side wall are tangent in one of the embodiments, the 6th arcwall face with
6th side wall is tangent.
The impeller includes wheel cap, blade and wheel disc in one of the embodiments, and the blade is arranged in the wheel
Between lid and the wheel disc, the cover board is equipped with the First terrace cooperated with the wheel cap, and the partition is equipped with and institute
State the second step face of wheel disc cooperation.
The return channel is equipped with reflux blade, and described time towards the side of the partition in one of the embodiments,
Stream blade is abutted against with the partition.
The centrifugal compressor further includes wheel cap sealing element in one of the embodiments, and the wheel cap sealing element is placed in
The outer rim of the air inlet is simultaneously matched with the impeller, for being sealed to the cover board.
Compared with prior art, a kind of centrifugal compressor provided by the invention, has the advantages that
The first side wall and second sidewall constitute 180 ° of bend, and the air-flow in diffusion channel is changed the direction of motion；
First arcwall face is corresponding with third arcwall face, and the difference of radius and diffusion channel is of same size between the two.First plane
Setting can control commutation channel length, correspondingly, it is flat to increase by second between third arcwall face and the 4th arcwall face
Face is matched with the length of the first side wall, is smoothly transitted into return flow line with playing the gas in diffusion channel, is avoided gas
Body is flowed into the loss that return flow line gas flows from diffusion channel.
Detailed description of the invention
The following drawings is only used for that those skilled in the art is made to more fully understand technical solution of the present invention, is not to this hair
Bright limitation, those skilled in the art can obtain other attached drawings according to the technique and scheme of the present invention.
Fig. 1 is a kind of structural schematic diagram one of centrifugal compressor provided by the invention；
Fig. 2 is the perspective view of the explosion of centrifugal compressor in Fig. 1；
Fig. 3 is the cross-sectional view of centrifugal compressor in Fig. 1；
Fig. 4 is the structural schematic diagram of Fig. 3 cover plate；
Fig. 5 is the structural schematic diagram of partition and return channel in Fig. 3；
Fig. 6 is the structural schematic diagram of impeller in Fig. 3.
Label declaration:
100, centrifugal compressor；101, air-supply passage；10, impeller；11, wheel cap；12, blade；13, wheel disc；20, diffusion
Device；21, cover board；211, First terrace；212, the 7th arcwall face；22, partition；221, second step face；222, the 8th arc
Face；23, air inlet；30, return channel；31, reflux blade；32, air outlet；40, diffusion channel；50, commutation channel；51, first
Side wall；511, the first arcwall face；512, the second arcwall face；513, the first plane；52, second sidewall；521, third arcwall face；
522, the 4th arcwall face；60, return flow line；61, the 5th side wall；62, the 6th side wall；70, flow-guiding channel；71, third side wall；
72, the 4th side wall；80, flow pass；81, heptalateral wall；811, the 5th arcwall face；82, the 8th side wall；821, the 6th arc
Face；90, wheel cap sealing element.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to better describe and illustrate embodiments herein, one or more attached drawing can refer to, but attached for describing
The additional detail or example of figure are not construed as to present invention creation, current described embodiment or preferred side
The limitation of the range of any one in formula.
It should be noted that when component be referred to as with another component " connection " when, it can directly with another component
It connects or there may also be components placed in the middle.When a component is considered as " being set to " another component, it be can be directly
It connects and is arranged on another component or may be simultaneously present component placed in the middle.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " it include one or more phases
Any and all combinations of the listed item of pass.
In addition, unless otherwise defined, the otherwise noun of locality used in the present invention, such as " upper and lower, left and right " are opposite
The description carried out for the orientation shown in attached drawing.
As shown in Figure 1 to Figure 3, the present invention provides a kind of centrifugal compressor 100, to convey air or mixed gas, and
Its pressure is improved to air or mixed gas.
Specifically, the centrifugal compressor 100 includes impeller 10, diffuser 20 and return channel 30, and the impeller 10 is pacified
Air inlet 23 loaded on the diffuser 20, the diffuser 20 include cover board 21 and partition 22, the cover board 21 with it is described
The accommodating chamber (not shown) for storing partition 22 is formed between return channel 30, the partition 22 is contained in the accommodating chamber simultaneously
The accommodating chamber is separated into the air-supply passage 101 being connected to the air inlet 23；The air-supply passage 101 includes diffusion
Channel 40, commutation channel 50 and return flow line 60, the diffusion channel 40 are connected to the air inlet 23, the commutation channel
50 are set between the diffusion channel 40 and return flow line 60.
It is understood that forming diffusion channel 40, shape between partition 22 and return channel 30 between cover board 21 and partition 22
At return flow line 60, commutation channel 50 is provided between return flow line 60 and diffusion channel 40, return flow line 60 is logical by commutation
Road 50 is connected to diffusion channel 40, and for carrying out water conservancy diversion to the gas from diffusion channel 40.
Wherein, return channel 30 is fixed on diffuser 20 by fastener (not shown), and return channel 30 offers through-hole, cover board
21 offer fastener hole, and fastener is fixedly connected by through-hole with fastener hole, and return channel 30 is fixed on cover board 21.Specifically
Ground, fastener are fastening bolt, and the lateral wall of fastening bolt is equipped with external screw thread, and the inner sidewall of fastener hole is equipped with to be cooperated with external screw thread
Internal screw thread.
Further, as shown in Fig. 3, Fig. 4 and Fig. 5, the commutation channel 50 has opposite the first side wall 51 and second
The inner sidewall of the cover board 21 is arranged in side wall 52, the first side wall 51, and the second sidewall 52 is arranged in the partition 22
Lateral wall, the first side wall 51 includes the first arcwall face 511, the second arcwall face 512 and the first plane 513, described the
One plane 513 is arranged between first arcwall face 511 and second arcwall face 512, and the second sidewall 52 includes the
Three arcwall faces 521 and the 4th arcwall face 522.
It is understood that the first side wall 51 and second sidewall 52 constitute 180 ° of bend, it will be in diffusion channel 40
Air-flow change the direction of motion；First arcwall face 511 is corresponding with third arcwall face 521, between the two the difference and expansion of radius
Pressure passageway 40 it is of same size.The setting of first plane 513 can control the length in commutation channel 50, correspondingly, third arc
It can increase by the second plane (not shown) between face 521 and the 4th arcwall face 522 to be matched with the length of the first side wall 51, with
It plays the gas in diffusion channel 40 to be smoothly transitted into return flow line 60, avoids gas from being flowed into reflux from diffusion channel 40 and lead to
The loss of 60 gas of road flowing.
Further, as shown in Fig. 3, Fig. 4 and Fig. 5, it is arranged between the diffusion channel 40 and the outlet of the impeller 10
There is flow-guiding channel 70, the flow-guiding channel 70 has opposite third side wall 71 and the 4th side wall 72, and the third side wall 71 is set
It sets in the cover board 21, the 4th side wall 72 setting and the partition 22, the third side wall 71 is from the diffusion channel 40
It is opened outside to 10 direction of impeller.
It is understood that third side wall 71 is opened from outside diffusion channel 40 to 10 direction of impeller, it can prevent gas from expanding
It flows back in pressure passageway 40, improves flowing gas state therein, be conducive to promote 100 performance of centrifugal compressor.
Wherein, in the present embodiment, the angular range between the third side wall 71 and vertical direction is 1 ° -15 °, can
To prevent gas from flowing back in diffusion channel 40.
Further, the width in the diffusion channel 40 is width of the flow-guiding channel 70 towards described 10 one end of impeller
0.75~1.0 times.
It is understood that by the width in diffusion channel 40 and flow-guiding channel 70 towards 10 one end of impeller width change
Change can control flowing of the gas in diffusion channel 40, guarantee stream of the gas exported from impeller 10 in diffusion channel 40
Dynamic uniformity.
Further, as shown in figure 5, the return flow line 60 has opposite the 5th side wall 61 and the 6th side wall 62, institute
The setting of the 5th side wall 61 is stated in the partition 22, the 6th side wall 62 is arranged in the return channel 30, the 5th side wall 61
Export direction along import to the return flow line 60 of the return flow line 60 is gradually flared out.
It is understood that since the gas entered in return flow line 60 from diffusion channel 40 is the biggish shakiness of flow velocity
Constant current, flow losses are larger, and the width that width≤return flow line 60 of design 60 import of return flow line exports can make reflux logical
Road 60 plays certain diffusion action, reduces flow velocity, improves the stability of gas flowing；In view of 60 inner surface of return flow line
Roughness is larger, further designs four times that 60 exit width of return flow line is no more than 60 entrance width of return flow line, Ke Yibao
Card gas smoothly flows through return flow line 60；6th side wall 62 is vertical, and the angle between the 5th side wall 61 and vertical direction can be true
The air-flow flowing protected in return flow line 60 is uniform, and with certain gas acceleration or gas deceleration diffusion action.
In the present embodiment, the angular range between the 5th side wall 61 and vertical direction is 1~10 °, can play and draw
Conductive gas is flowed towards the 5th side wall 61, improves diversion effect.
Wherein, cover board 21 is when being mounted on return channel 30, it can be ensured that between the second arcwall face 512 and the 6th side wall 62
Smooth transition；To avoid components assembly from being likely to occur interference, it is arranged between 0.5mm-1mm between cover board 21 and return channel 30
Gap.
Further, as shown in figure 5, the return channel 30 offers air outlet 32, the air outlet 32 and the reflux
Flow pass 80 is provided between channel 60, the flow pass 80 has opposite heptalateral wall 81 and the 8th side wall 82, institute
The setting of heptalateral wall 81 is stated in the partition 22, the 8th side wall 82 is arranged in the return channel 30, the heptalateral wall 81
Including the 5th arcwall face 811, the 8th side wall 82 includes the 6th arcwall face 821.
It is understood that flow pass 80 can make the air-flow in return flow line 60 change the direction of motion, the 5th arc
Face 811 and the 6th arcwall face 821 constitute flow pass 80, can make air-flow is smooth excessively to arrive at air outlet 32, be conducive to
Promote 100 grades of performances of centrifugal compressor.
Preferably, the 5th arcwall face 811 and the 5th side wall 61 are tangent, the 6th arcwall face 821 with it is described
6th side wall 62 is tangent.Further make air-flow is smooth excessively to arrive at air outlet 32.
Further, as shown in fig. 6, the impeller 10 includes wheel cap 11, blade 12 and wheel disc 13, the blade 12 is set
It sets between the wheel cap 11 and the wheel disc 13, the cover board 21 is equipped with the First terrace cooperated with the wheel cap 11
211, the partition 22 is equipped with the second step face 221 cooperated with the wheel disc 13.
It is understood that the outer circle of the outer circle of wheel cap 11, the outer circle of blade 12, wheel disc 13 can be adjusted flexibly, wheel cap 11
Outer circle, after the outer circle of wheel disc 13 matches with diffusion channel 40, the outer circle for changing blade 12 can be passed through and impeller 10 is run
The variable parameter operation of centrifugal compressor 100 can be realized in revolving speed, improves the flexibility of 100 grades of centrifugal compressor designs.
Wherein, the distance between the First terrace 211 and the wheel cap 11 be 1~3mm, First terrace 211 with
It is attached between third side wall 71 by the 7th arcwall face 212, the radius of 0.5~3mm can be used in the 7th arcwall face 212, uses
Transition between First terrace 211 and third side wall 71.
The distance between the second step face 221 and the wheel disc 13 are 1~3mm.Second step face 221 and the 4th side
It is attached between wall 72 by the 8th arcwall face 222, the radius of 0.5~3mm can be used in the 8th arcwall face 222, is used for second
Transition between step surface 221 and the 4th side wall 72.
Further, as shown in Fig. 2, the return channel 30 is equipped with reflux blade 31 towards the side of the partition 22, and
The reflux blade 31 is abutted against with the partition 22.
It is understood that reflux blade 31 is fixed on return channel 30, and is arranged towards return flow line 60, make the leaf that flows back
Piece 31 is placed in return flow line 60, so that gas carries out gas when entering in return flow line 60, through reflux blade 31
Equably water conservancy diversion.Particularly, the position that 31 import of reflux blade starts be located at the 4th arcwall face 522 and the 5th side wall 61 handover
Position, the position that the outlet of reflux blade 31 terminates are located at the position of the 6th side wall 62 and the handover of the 6th arcwall face 821.
In the present embodiment, reflux blade 31 is wholely set with return channel 30, can directly be processed on return channel 30
The structures such as reflux blade 31 are formed, the processing technology of return channel 30 is simplified.Certainly, in other implementations, reflux blade
31 can also be by being welded on return channel 30, as long as reflux blade 31 can be fixed on return channel 30.
Further, as shown in Fig. 2, the centrifugal compressor 100 further includes wheel cap sealing element 90, the wheel cap sealing element
90 are placed in the outer rim of the air inlet 23 and match with the impeller 10, for being sealed to the cover board 21.
It is understood that wheel cap sealing element 90 is in a ring, wheel cap sealing element 90 is fixedly connected with cover board 21, wheel cap sealing
The inner edge of part 90 and 11 clearance fit of wheel cap of impeller 10, wheel cap 11 can be relatively rotated with wheel cap sealing element 90.Wheel cap sealing
The air-flow that part 90 prevents impeller 10 from exporting flows back to 10 import of impeller.
Wherein, wheel cap sealing element 90 is made of low-durometer material.Wheel cap sealing element 90 is fixed on by bolt (not shown)
On cover board 21, via hole (not shown) is offered on wheel cap 11, and fixation hole (not shown) corresponding with via hole is offered on cover board 21,
Bolt is equipped with external screw thread, and the inner sidewall of fixation hole is equipped with the internal screw thread cooperated with external screw thread, and bolt passes through via hole and fixation
Hole is threadedly coupled.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of centrifugal compressor, including impeller, diffuser and return channel, the impeller are installed on the air inlet of the diffuser
Mouthful；
The diffuser includes cover board and partition, and the cover board is installed on the return channel and is formed between the return channel
Accommodating chamber, the partition are contained in the accommodating chamber and the accommodating chamber are separated into one and send with what the air inlet was connected to
Wind channel；
The air-supply passage includes diffusion channel, commutation channel and return flow line, and the diffusion channel and the air inlet connect
Logical, the commutation channel is set between the diffusion channel and return flow line；It is characterized in that, the commutation channel has relatively
The first side wall and second sidewall, the first side wall inner sidewall of the cover board is set, the second sidewall is arranged in institute
The lateral wall of partition is stated, the first side wall includes the first arcwall face, the second arcwall face and the first plane, first plane
It is arranged between first arcwall face and second arcwall face, the second sidewall includes third arcwall face and the 4th arc
Shape face.
2. centrifugal compressor unit according to claim 1, which is characterized in that the diffusion channel goes out with the impeller
Flow-guiding channel is provided between mouthful, the flow-guiding channel has opposite third side wall and the 4th side wall, and the third side wall is set
It sets in the cover board, the 4th side wall setting and the partition, the third side wall is from the diffusion channel to the impeller
It is opened outside direction.
3. centrifugal compressor unit according to claim 2, which is characterized in that between three side wall and vertical direction
Angular range is 1 ° -15 °.
4. centrifugal compressor unit according to claim 2 or 3, which is characterized in that the width in the diffusion channel is institute
State 0.75~1.0 times of width towards described impeller one end of flow-guiding channel.
5. centrifugal compressor unit according to claim 1, which is characterized in that the return flow line has the opposite the 5th
Side wall and the 6th side wall, the 5th side wall setting is in the partition, and the 6th side wall setting is in the return channel, and described the
Export direction of five side walls along import to the return flow line of the return flow line is gradually flared out, and with vertical direction it
Between angular range be 1 ° -10 °.
6. centrifugal compressor unit according to claim 5, which is characterized in that the return channel offers air outlet, institute
It states and is provided with flow pass between air outlet and the return flow line, the flow pass has opposite heptalateral wall and the 8th
Side wall, the heptalateral wall setting is in the partition, and the 8th side wall is arranged in the return channel, and the heptalateral wall includes
5th arcwall face, the 8th side wall include the 6th arcwall face.
7. centrifugal compressor unit according to claim 6, which is characterized in that the 5th arcwall face and the 5th side
Wall is tangent, and the 6th arcwall face and the 6th side wall are tangent.
8. centrifugal compressor unit according to claim 1, which is characterized in that the impeller include wheel cap, blade and
Wheel disc, the blade are arranged between the wheel cap and the wheel disc, and the cover board is equipped with first cooperated with the wheel cap
Step surface, the partition are equipped with the second step face cooperated with the wheel disc.
9. centrifugal compressor unit according to claim 1, which is characterized in that the return channel towards the partition one
Side is equipped with reflux blade, and the reflux blade is abutted against with the partition.
10. centrifugal compressor unit according to claim 1, which is characterized in that the centrifugal compressor further includes wheel cap
Sealing element, the wheel cap sealing element are placed in the outer rim of the air inlet and match with the impeller, for the cover board into
Row sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910716612.3A CN110439826A (en) | 2019-08-05 | 2019-08-05 | Centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910716612.3A CN110439826A (en) | 2019-08-05 | 2019-08-05 | Centrifugal compressor |
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| Publication Number | Publication Date |
|---|---|
| CN110439826A true CN110439826A (en) | 2019-11-12 |
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| CN201910716612.3A Pending CN110439826A (en) | 2019-08-05 | 2019-08-05 | Centrifugal compressor |
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| CN106762841A (en) * | 2016-12-05 | 2017-05-31 | 珠海格力电器股份有限公司 | Reflux device and diffuser integrated structure and centrifugal compressor |
| CN211116675U (en) * | 2019-08-05 | 2020-07-28 | 浙江盾安机电科技有限公司 | Centrifugal compressor |
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- 2019-08-05 CN CN201910716612.3A patent/CN110439826A/en active Pending
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| CN211116675U (en) * | 2019-08-05 | 2020-07-28 | 浙江盾安机电科技有限公司 | Centrifugal compressor |
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