CN109630431A - A kind of multistage centrifugal compressor being connected with motor housing - Google Patents
A kind of multistage centrifugal compressor being connected with motor housing Download PDFInfo
- Publication number
- CN109630431A CN109630431A CN201710956539.8A CN201710956539A CN109630431A CN 109630431 A CN109630431 A CN 109630431A CN 201710956539 A CN201710956539 A CN 201710956539A CN 109630431 A CN109630431 A CN 109630431A
- Authority
- CN
- China
- Prior art keywords
- centrifugal compressor
- motor
- medium
- impeller
- diffuser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- F04D17/12—Multi-stage 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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
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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
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- 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
- F04D29/444—Bladed diffusers
-
- 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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
Abstract
The invention discloses a kind of multistage centrifugal compressor being connected with motor housing, the impeller of centrifugal compressor is separately mounted to the both ends of motor shaft, shares an axis with motor.The centrifugal compressor at motor shaft both ends is connected by the medium channel being embedded on motor housing or motor stator core.Diffuser, the return channel of centrifugal compressor are that the interior sky of single side opening is barrel-shaped, and there is hole at center, and guide vane, and the circumference uniform distribution medium tap on the shell that final stage expands device is arranged in inner face.
Description
Technical field
The present invention relates to a kind of structure of multistage centrifugal compressor being connected with motor housing, can apply in liquid or
The fields such as gas conveying and compression refrigeration.
Background technique
Existing centrifugal compressor has totally enclosed type, semi-enclosed and open-type three classes by frame mode point.It is closed
Centrifugal compressor, be motor is direct-connected with compressor, motor and compressor share a main shaft, are enclosed in same casing, no
Detachable maintenance.Semienclosed centrifugal compressor is the shell by motor and compressor, is made of one, the axis and pressure of motor
The axis of contracting machine is not same root, can be with detachable maintaining.Open-type centrifugal compressor is that motor and compressor are made into two independences
Individual, be connected by shaft coupling or belt, convenient disassembly, volume is relatively bulky.
The present invention is that have totally enclosed type centrifugal compressor volumetric to the supplement of existing centrifugal compressor structure mode
It is small, be sealed, antileakaging advantage.The advantages of being provided simultaneously with detachable maintenance, and breach existing totally enclosed type centrifugation
Compressor is only applicable to the limitation of small refrigerating capacity unit, to keep the range of application more extensive.
Summary of the invention
The present invention provides the structure of a kind of motor and centrifugal compressor integral type, and the impeller of compressor is mounted in the two of motor shaft
It holds, the channel of pumped (conveying) medium is on motor housing between the impeller of both ends, motor and the uncommon shell of compressor.The present invention
In addition to having the advantages of plain total centrifugal compressor, there are also detachable maintenance, refrigerating capacity can be done bigger excellent
Point.
Technology of the invention is that such as impeller of the rotor part in centrifugal compressor is separately fixed at rotor axis of electric two
End, motor and centrifugal compressor share an axis.The fixing element of centrifugal compressor, such as chopped-off head diffuser, chopped-off head partition, final stage
The components such as partition, return channel are directly installed on motor housing.Other fixing elements such as inlet plenum, volute casing and bearing cap etc.,
It connects and is mounted on motor housing.Stator component such as inlet plenum, chopped-off head diffuser, motor housing, return channel and volute, collectively constitute
The shell of complete machine.Shell and other stator components and rotor elements cooperate, composition centrifugal compressor and motor integrated
Multistage centrifugal compressor.
Specific way is several axial medium channels of processing insertion on the shell of motor.Motor housing is run through in channel,
The shape in channel, it is horizontal wear area and quantity, need to determine according to compressor refrigerating capacity.
In the present invention, rotor is fixed by chopped-off head partition and L O section by head end bearing and end bearing support
On motor housing.
In the present invention, motor housing is one of fixing element, and the medium flowed out by first stage impeller passes through the medium on shell
Channel is transported to impeller.In the present invention, medium is after inlet plenum reaches first stage impeller acting, into chopped-off head diffuser, so
Return channel is entered by the medium channel in motor housing afterwards, impeller is reached and continues to do work, then through final stage diffuser and snail
Room is discharged by outlet.
Chopped-off head diffuser of the invention, structure type are that the interior sky of single side opening is barrel-shaped, are fixed on motor housing, in
Guide vane is arranged in heart aperture, inner face, forms working cavity with chopped-off head partition.By first stage impeller stream Lai medium in water conservancy diversion leaf
Under piece and the barrel-shaped inner wall effect of interior sky, the direction of flowing is flowed into motor housing by being changed to axial direction radially away from axle center
The medium channel parallel with axis, flows to impeller.
Return channel in the present invention, structure type are that the interior sky of single side opening is barrel-shaped, are fixed on the shell of motor, in
Guide vane is arranged in heart aperture, inner face, forms working cavity with L O section.By medium channel stream Lai medium, it is empty inside
Under barrel-shaped inner wall effect, the flow direction of medium changes, and by changing into radial direction along axial flowing, and flows to axle center,
Under the action of guide vane, medium enters impeller.
Final stage diffuser in the present invention, structure type are that the interior sky of single side opening is barrel-shaped, and there is hole at center, and inner face is set
Guide vane is set, on the shell circumference uniform distribution medium tap, together with final stage diffuser bottom plate, is mounted on return channel, structure
At working cavity.By impeller stream Lai medium, static pressure further increases in this cavity, and through on shell medium be discharged
Hole enters volute chamber.
The medium channel on chopped-off head diffuser, return channel and motor housing in the present invention, collectively constitutes medium by head
The path that grade impeller is conveyed to impeller.
In the present invention, blade on impeller can be made the 3 d impeller of distorted shape as needed, also can be made leaf
The non-distorted conventional impeller of piece.Diffuser can be made vaneless diffuser as needed, also can be made vaned blade
Diffuser and low consistency vane diffuser and half high vane diffuser.
In the present invention, the series of motor shaft both ends impeller can according to need and accordingly increase or reduce.
In the present invention, medium channel is directly embedded on motor stator core, volume can further reduce.In this structure
In, the stator core in embedding medium channel can do the shell of motor, also can according to need and still further install shell.
In recent years, the motor of the high performance such as speed regulating motor, brushless motor, reluctance motor is widely applied, such control
The rated speed of motor can achieve the several times using traditional power frequency asynchronous machine or more.The raising of centrifugal compressor revolving speed,
Higher flow and pressure can be exported, so that the scope of application of the invention is more extensive.
The invention has the advantages that can substantially reduce the volume of centrifugal compressor, very easily detachable maintaining can be with
The service life of equipment is greatly prolonged, the application range of centrifugal compressor has effectively been widened.Cooperation control class motor such as adjusts the speed electricity
Machine, brushless motor etc. can have good application effect in air conditioner refrigerating, flow control, energy conservation and environmental protection etc..
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the present invention along axis profile schematic diagram；
Fig. 2 is the schematic diagram of conventional double shrouded wheel；
Fig. 3 is the schematic diagram of chopped-off head diffuser；
Fig. 4 is motor housing and medium channel schematic diagram；
Fig. 5 is return channel schematic diagram；
Fig. 6 is the volute casing schematic diagram of spiral case；
Fig. 7 is final stage diffuser schematic diagram；
In figure: 1. inlet plenums, 2. first stage impellers, 3. chopped-off head diffusers, 4. chopped-off head partitions, 5. stator winding, 6. motors turn
Son, 7. motor housings, 8. return channels, 9. final stage diffuser bottom plates, 10. impellers, the outlet of 11. volute chambers, 12. end bearings,
13. end bearing cap, 14. spiral cases, 15. final stage diffusers, 16. volute chambers, 17. L O sections, 18. motor stators, 19. motors
Axis, 20. head end bearings, 21. head end bearing caps, 22. impeller blades, 23. chopped-off head diffuser guide vanes, on 24. motor housings
Medium channel, 25. return channel guide vanes, 26. final stage diffuser guide vanes, 27. final stage diffuser medium taps.
Specific embodiment
[embodiment 1]
The motor stator 18 of motor and 5 structure of stator winding and effect, identical as common motor in the present invention.This hair
On motor shaft 19, motor shaft 19 is supported the rotor 6 of motor in bright by head end bearing 20 and end bearing 12, and passes through head
Grade partition 4 and L O section 17 are fixed on motor housing 7.Head end bearing cap 21 and end bearing cap 13, respectively to the head shaft
Hold 21 and end bearing 13 be fixed.Motor shaft 19, will also be to the head of centrifugal compressor in addition to completing to the load-bearing of rotor 6
Grade impeller 2 and impeller 10 carry out load-bearing.Motor housing 7 also expands chopped-off head in addition to the fixation for completing motor stator 18
The centrifugal compressor at the motors both ends such as depressor 3, chopped-off head partition 4, return channel 8, L O section 17, final stage diffuser 16 and volute 14
Fixing element link up, form an entirety.When work, medium enters inlet plenum 1 by entrance.The rotation of first stage impeller 2,
The medium for entering inlet plenum 1 can be drawn to first stage impeller 2.2 blade 22 of first stage impeller does work to medium, due to the work of centrifugal force
With the speed of medium rises, and flow direction is become by axial radially away from axle center.The medium of Radial Flow enters chopped-off head diffuser
3, in the chopped-off head working cavity being made of chopped-off head diffuser 3 and chopped-off head partition 4, flow velocity decline, static pressure rises.Since chopped-off head expands
The effect of empty barrel-shaped inner wall and guide vane 23 in depressor, flow direction of medium is in chopped-off head working cavity by being radially changed to
It is axial, flow into the medium channel 24 on motor housing 7.After the medium channel 24 for flowing through motor housing 7, medium enters return channel 8.
In the working cavity being made of return channel 8 and L O section 17, due to barrel-shaped inner wall empty in return channel 8 and guide vane 25
Effect, the flow direction of medium is flowed radially and to axle center from axially varying, continues to flow into impeller 10.Final stage
Impeller 10 again does work to medium, by the flow direction of medium again by axially varying for radially away from axle center, flowing velocity into
One step improves.The medium flowed out from impeller 10, enters final stage diffuser 16, forms by final stage diffuser and bottom plate 9
Final stage working cavity in, the static pressure of medium further increases.Medium continues to flow under the guidance of final stage guide vane 26, through end
The medium tap 27 of grade diffuser 16 enters volute casing 16.Finally, the medium that pressure is significantly increased, by 11 discharge of outlet.
[embodiment 2]
Medium channel is embedded on motor stator core in the present invention, motor stator 18 and 5 structure of stator winding and effect,
It is identical as common motor.The rotor 6 of motor in the present invention is on motor shaft 19, and motor shaft 19 is by 20 He of head end bearing
End bearing 12 supports, and is fixed on motor housing 7 by chopped-off head partition 4 and L O section 17.Head end bearing cap 21 and end
End bearing cover 13 is respectively fixed head end bearing 21 and end bearing 13.Motor shaft 19 is except the load-bearing completed to rotor 6
Outside, will also first stage impeller 2 to centrifugal compressor and impeller 10 carry out load-bearing.Motor housing 7 is except completion motor stator
Outside 18 fixation, while also by chopped-off head diffuser 3, chopped-off head partition 4, return channel 8, L O section 17, final stage diffuser 16 and whirlpool
The fixing element of the centrifugal compressor at the motors both ends such as shell 14 links up, and forms an entirety.When work, medium by entrance into
Enter inlet plenum 1.The medium for entering inlet plenum 1 can be drawn to first stage impeller 2 by the rotation of first stage impeller 2.2 blade of first stage impeller
22 pairs of medium actings, due to the effect of centrifugal force, the speed of medium rises, and flow direction is become by axial radially away from axle center.
The medium of Radial Flow enters chopped-off head diffuser 3, in the chopped-off head working cavity being made of chopped-off head diffuser 3 and chopped-off head partition 4,
Flow velocity decline, static pressure rise.Due to the effect of barrel-shaped inner wall and guide vane 23 empty in chopped-off head diffuser, flow direction of medium
By being radially changed to axial direction in chopped-off head working cavity, the medium channel on motor stator core is flowed into.Flow through motor stator iron
After medium channel on core, medium enters return channel 8.In the working cavity being made of return channel 8 and L O section 17, due to
The effect of empty barrel-shaped inner wall and guide vane 25 in return channel 8, the flow direction of medium is from axially varying radially and to axis
Heart flowing, continues to flow into impeller 10.Impeller 10 again to medium do work, by the flow direction of medium again by
Axially varying is radially away from axle center, and flowing velocity further increases.The medium flowed out from impeller 10, enters final stage
Diffuser 16, in the final stage working cavity being made of final stage diffuser and bottom plate 9, the static pressure of medium is further increased.Medium
Continue to flow under the guidance of final stage guide vane 26, the medium tap 27 through final stage diffuser 16 enters volute casing 16.Finally, it presses
The medium that power is significantly increased, by 11 discharge of outlet.
Claims (7)
1. a kind of multistage centrifugal compressor structure being connected with motor housing, centrifugal compressor and motor share an axis.
2. multistage centrifugal compressor according to claim 1, which is characterized in that the impeller of centrifugal compressor is installed on motor
The both ends of axis.
3. multistage centrifugal compressor according to claim 1, which is characterized in that the centrifugal compressor positioned at motor shaft both ends
It is connected by the medium channel being embedded into motor housing.
4. multistage centrifugal compressor according to claim 1, which is characterized in that for being connected to the centrifugation pressure at motor shaft both ends
The medium channel of contracting machine, is directly embedded on the stator core of motor.
5. multistage centrifugal compressor according to claim 1, which is characterized in that the structure type of chopped-off head diffuser is single side
The interior sky of opening is barrel-shaped, and there is hole at center, and guide vane is arranged in inner face.
6. multistage centrifugal compressor according to claim 1, which is characterized in that the structure type of return channel is single side opening
Interior sky it is barrel-shaped, there is a hole at center, and guide vane is arranged in inner face.
7. multistage centrifugal compressor according to claim 1, which is characterized in that final stage diffuser structure form is opening one side
The interior sky of mouth is barrel-shaped, and there is hole at center, and guide vane is arranged in inner face, on the shell circumference uniform distribution medium tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710956539.8A CN109630431A (en) | 2017-10-09 | 2017-10-09 | A kind of multistage centrifugal compressor being connected with motor housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710956539.8A CN109630431A (en) | 2017-10-09 | 2017-10-09 | A kind of multistage centrifugal compressor being connected with motor housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109630431A true CN109630431A (en) | 2019-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710956539.8A Pending CN109630431A (en) | 2017-10-09 | 2017-10-09 | A kind of multistage centrifugal compressor being connected with motor housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109630431A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319038A (en) * | 2019-06-20 | 2019-10-11 | 苏州工业园区星德胜电机有限公司 | A kind of efficient Wet-dry blower |
-
2017
- 2017-10-09 CN CN201710956539.8A patent/CN109630431A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319038A (en) * | 2019-06-20 | 2019-10-11 | 苏州工业园区星德胜电机有限公司 | A kind of efficient Wet-dry blower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190416 |