CN206206288U - A kind of reverse-flow type balancing disc structure - Google Patents
A kind of reverse-flow type balancing disc structure Download PDFInfo
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- CN206206288U CN206206288U CN201621082499.6U CN201621082499U CN206206288U CN 206206288 U CN206206288 U CN 206206288U CN 201621082499 U CN201621082499 U CN 201621082499U CN 206206288 U CN206206288 U CN 206206288U
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- casing
- balancing frame
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- impeller
- flow type
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Abstract
The utility model discloses a kind of reverse-flow type balancing disc structure, including impeller, stator, rotor and casing, in casing, in stator, impeller is fixed on rotor rotor bearing stator, also include balancing frame, return duct and spiral case, spiral case is fixed on casing, and balancing frame is sheathed on rotor, and is tightly connected between the outer circle wall and casing inner wall of balancing frame, one end of return duct is connected with casing, and the other end is connected with spiral case.The utility model reverse-flow type balancing frame can accomplish zero leakage.
Description
Technical field：
The utility model is related to a kind of reverse-flow type balancing disc structure.
Background technology：
Axial force in centrifugal compressor machine suffered by impeller is one of Main Load, and this load is finally needed by only
Thrust bearing undertakes.With the raising of pressure ratio and series, the axial force suffered by bearing can also be improved therewith.
In rotating speed compressor high, rotating speed then compressor volume more high is smaller, material cost is lower.In order to improve rotating speed,
These compressors usually use rotating speed mechanical bearing high, or gas suspension bearing, magnetic suspension bearing.But it is high as rotating speed is improved
The bearing capacity of fast mechanical bearing is also lower, and cost and installation accuracy requirement are higher.Although gas suspension bearing and magnetic suspension bearing energy
Rotating speed higher is enough born, but bearing capacity is much lower relative to mechanical bearing, gas suspension thrust bearing lacking in this respect
Point is especially protruded.Therefore a part of axial force is usually offset using balancing frame in INVESTIGATION ON A HIGH SPEED CENTRIFUGAL COMPRESSOR, bearing is reduced
Axial load.
Common centrifugal compressor balancing disc structure is as shown in Figure 1.Axial force suffered by impeller 11 is to the left in the structure.Balance
The left gas of disk 12 come from impeller outlet, and pressure is higher；Top right gas UNICOM air, pressure is relatively low；There is sealing in balancing frame outside
Structure is leaked with reducing both sides gas.Therefore gas pressure suffered by balancing frame to the right, is cancelled out each other with axial force of impeller, so as to drop
The low axial load of bearing.
But there are several shortcomings in superincumbent structure：
1) sealing in the outside of balancing frame 12 can not accomplish zero leakage, therefore necessarily have the part working gas can be from exhaust outlet 10
It is discharged into air.
Because rotating speed is higher, here can not be using the lower mechanical seal of leakage.And if being not provided with exhaust outlet, then put down
Weighing apparatus disk pressure at both sides can be finally reached balance, so that balancing frame is ineffective.
2) when impeller pressure ratio is high, outlet pressure is not high, balancing frame is excessive overweight.
Because axial force of impeller is poor depending on impeller size and inlet and outlet pressure, and balancing frame axial force depends on balancing frame
The pressure differential of area and impeller outlet relative atmospheric, therefore in the low compressor of some inlet pressures, axial force of impeller is very big
And export the pressure differential very little of relative atmospheric, then need very big balancing frame effectively to reduce axial force.Excessive balancing frame
Not only cost is higher, seal more difficult, can also reduce rotor maximum speed, therefore do not applied in high speed compressor.
3) effect of the balancing frame is just effective only when impeller outlet pressure superatmospheric.
When inlet gas pressure is relatively low, impeller outlet pressure also below atmospheric pressure when, suffered by the balancing frame of above structure
Pressure is consistent with axial force of impeller, it is impossible to cancelled each other.
Therefore, it is necessory to be improved to solve the deficiency of prior art to prior art.
Utility model content：
The utility model is to provide a kind of reverse-flow type balancing disc structure to solve the problems, such as above-mentioned prior art.
The technical scheme that the utility model is used has：A kind of reverse-flow type balancing disc structure, including impeller, stator, rotor
And casing, in casing, in stator, impeller is fixed on rotor rotor bearing the stator, also including balancing frame, returns
Flow tube and spiral case, the spiral case are fixed on casing, and balancing frame is sheathed on rotor, and in the outer circle wall and casing of balancing frame
It is tightly connected between wall, one end of return duct is connected with casing, and the other end is connected with spiral case.
Further, the outer circle wall of the balancing frame is provided with comb.
The utility model has the advantages that：
1) reverse-flow type balancing frame can accomplish zero leakage.
Although still have labyrinth seal of the gas from balancing frame 12 leak into right side, this portion gas can be back into
Air flue, will not enter air.Therefore the static seal structure on casing can be relied on using the compressor of reverse-flow type balancing disc structure
Accomplish zero leakage.
2) balancing frame pressure at both sides difference is poor with impeller inlet and outlet pressure identical, and area is smaller.
Balancing frame pressure at both sides difference is poor with impeller inlet and outlet pressure identical, therefore still may be used when impeller outlet pressure is relatively low
Larger equilibrant force is obtained with less balancing frame.And axial force of impeller and balance dish axle are synchronous change, axle to power
Hold load change more steady.
3) when impeller outlet pressure subatmospheric, reverse-flow type balancing frame still normal work.
Because reverse-flow type balancing frame pressure at both sides difference is not influenceed by atmospheric pressure, therefore when impeller outlet pressure subatmospheric
When, balancing frame right atrial pressure still is below left side, still can play a part of to reduce axial force.
Brief description of the drawings：
Fig. 1 is the schematic diagram of balancing disc structure in the prior art.
Fig. 2 is the schematic diagram of the utility model reverse-flow type balancing disc structure.
Specific embodiment：
The utility model is further described below in conjunction with the accompanying drawings.
As shown in Fig. 2 a kind of reverse-flow type balancing disc structure of the utility model, including impeller 11, balancing frame 12, return duct
13rd, stator 15, rotor 16, casing 17 and spiral case 21, spiral case 21 are fixedly connected with casing 17, and stator 15 is located in casing 17,
Rotor 16 is supported in stator 15, and one end stretches in outside casing 17 and is fixedly connected with impeller 11, and impeller 11 is placed in spiral case 21.
Balancing frame 12 is sheathed on rotor 16, and is tightly connected between the outer circle wall and the inwall of casing 17 of balancing frame 12, return duct 13
One end be connected with casing 17, the other end is connected with spiral case 21.
Comb 120 is provided with the outer circle wall of balancing frame 12.The inwall of comb 120 on balancing frame 12 and casing 17 it
Between form mazy sealing structure.
The utility model has the following advantages that：
1) reverse-flow type balancing frame can accomplish zero leakage.
Although still have labyrinth seal of the gas from balancing frame 12 leak into right side, this portion gas can be back into
Air flue, will not enter air.Therefore the static seal structure on casing can be relied on using the compressor of reverse-flow type balancing disc structure
Accomplish zero leakage.
2) balancing frame pressure at both sides difference is poor with impeller inlet and outlet pressure identical, and area is smaller.
From figure 2 it can be seen that balancing frame pressure at both sides difference is poor with impeller inlet and outlet pressure identical, therefore work as impeller outlet
Still larger equilibrant force can be obtained when pressure is relatively low with less balancing frame.And axial force of impeller and balance dish axle are to power
It is synchronous change, bearing load change is more steady.
3) when impeller outlet pressure subatmospheric, reverse-flow type balancing frame still normal work.
Because reverse-flow type balancing frame pressure at both sides difference is not influenceed by atmospheric pressure, therefore when impeller outlet pressure subatmospheric
When, balancing frame right atrial pressure still is below left side, still can play a part of to reduce axial force.
The above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, some improvement can also be made on the premise of the utility model principle is not departed from, these improvement also should be regarded as
Protection domain of the present utility model.
Claims (2)
1. a kind of reverse-flow type balancing disc structure, including impeller (11), stator (15), rotor (16) and casing (17), it is described fixed
Sub (15) in casing (17), rotor (16) is supported in stator (15), and impeller (11) is fixed on rotor (16), its feature
It is：Also include balancing frame (12), return duct (13) and spiral case (21), the spiral case (21) is fixed on casing (17), balance
Disk (12) is sheathed on rotor (16), and is tightly connected between the outer circle wall and casing (17) inwall of balancing frame (12), backflow
The one end for managing (13) is connected with casing (17), and the other end is connected with spiral case (21).
2. reverse-flow type balancing disc structure as claimed in claim 1, it is characterised in that：On the outer circle wall of the balancing frame (12)
It is provided with comb (120).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621082499.6U CN206206288U (en) | 2016-09-26 | 2016-09-26 | A kind of reverse-flow type balancing disc structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621082499.6U CN206206288U (en) | 2016-09-26 | 2016-09-26 | A kind of reverse-flow type balancing disc structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206206288U true CN206206288U (en) | 2017-05-31 |
Family
ID=58761520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621082499.6U Active CN206206288U (en) | 2016-09-26 | 2016-09-26 | A kind of reverse-flow type balancing disc structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206206288U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168230A (en) * | 2016-09-26 | 2016-11-30 | 南京磁谷科技有限公司 | A kind of reverse-flow type balancing disc structure |
-
2016
- 2016-09-26 CN CN201621082499.6U patent/CN206206288U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168230A (en) * | 2016-09-26 | 2016-11-30 | 南京磁谷科技有限公司 | A kind of reverse-flow type balancing disc structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 99, Jinxin Middle Road, Jiangning District, Nanjing City, Jiangsu Province Patentee after: Nanjing Cigu Technology Co., Ltd Address before: Nine No. 211102 Bamboo Road, Jiangning Development Zone, Nanjing, Jiangsu, 100 Patentee before: NANJING CIGU LIMITED Corp. |
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| CP03 | Change of name, title or address |