CN201982377U - Air guider for centrifugal compressor - Google Patents
Air guider for centrifugal compressor Download PDFInfo
- Publication number
- CN201982377U CN201982377U CN2011200890240U CN201120089024U CN201982377U CN 201982377 U CN201982377 U CN 201982377U CN 2011200890240 U CN2011200890240 U CN 2011200890240U CN 201120089024 U CN201120089024 U CN 201120089024U CN 201982377 U CN201982377 U CN 201982377U
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- China
- Prior art keywords
- fluid director
- guide ring
- radial rib
- fitting seat
- compression unit
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to an air guider, which is arranged on a multi-stage centrifugal compressor. At the joint of two adjacent stages of compression units, airflow enters into a lower-stage compression unit from an upper-stage compression unit after guided through the air guider; and the air guider has the dual functions of guiding and rectification, and mainly comprises guide rings, radial rib plates and a mounting base, wherein the radial rib plates are uniformly distributed in the circumferential direction of the mounting base, fixed on the mounting base, and used for supporting the guide rings at the top ends of the radial rib plates.
Description
Technical field
The utility model relates to the fluid director of a kind of use in centrifugal compressor.
Background technique
As shown in Figure 1, centrifugal compressor is made up of rotor, stator and bearing 1 etc.Impeller 2 parts such as grade are enclosed within on the main shaft 4 forms rotor, and main shaft 4 is bearing on the bearing 1, is driven and high speed rotating by power engine.Stator comprises parts such as casing 5, suction chamber 6 and discharge chamber 7.Have only the centrifugal compressor of an impeller to be called single-stage radial compressor, the multistage centrifugal compressor that is called of two above impellers is arranged." level " is made up of the passages such as Diffuser of impeller and back thereof.During the impeller high speed rotating of centrifugal compressor, because the interaction of power between blade and the gas mainly is an action of centrifugal force, gas sucks from the impeller center, flows to impeller outer edge along Ye Dao (passage between the blade).Impeller is to the gas work done, and gas obtains energy, and pressure and speed improve.Then, gas stream is through passages such as Diffusers, and speed reduces, and pressure further improves, and promptly kinetic energy changes the pressure energy into, enters volute casing by the Diffuser effluent air at last and transfers out, and perhaps enters next stage continuation compression through bend and return channel.Gas is when entering the next stage compression, and needing to turn enters the next stage impeller greater than 90 degree.In this zone, the turning of gas causes big pressure gradient, and separating appears in upper wall regions, causes bigger aerodynamic loss.Traditional corrective measure is to install fluid director 3 additional, as shown in Figure 2, fluid director 3 is one or more layers guide ring 31, being fixed on higher level's compression unit by bolt 32 enters on the right wall 52 of passage of subordinate's compression unit, to reduce pressure gradient and aerodynamic loss, among the figure shown in the arrow is exactly gas flow direction.But in the practice, traditional guide ring has following defective:
1, be installed in the afterbody of casing by the entrance point bolt, it is not very convenient that installation and removal are safeguarded;
2, because the spatial constraints of bolt position, the trailing edge part right angle of derotation blade is recessed, sees last figure, makes gas go out mobile inhomogeneous from last derotation blade, and this nonuniformity is brought into the runner and the next stage impeller of back, causes aerodynamic loss;
3, peripheral a plurality of bolt and installation accessories are fixed in the guide ring entrance region, say from the aeroelasticity angle to belong to bluff body, and gas is had barrier effect, and the downstream can form mobile tail, also causes aerodynamic loss;
4, clamping bolt is installed on the guide ring entrance region, and each guide ring becomes overhanging beam under the effect of aerodynamic force, says the design that is not good from the structural dynamics angle.When the natural frequency of the frequency that instability had of gas and guide ring near the time, resonate, during serious vibration, may cause the fracture of guide ring, components downstream is caused damage;
5, clamping bolt is installed on the guide ring entrance region, each guide ring becomes overhanging beam under the effect of aerodynamic force, when the natural frequency of the frequency that instability had of gas and guide ring near the time, resonate, the guide ring Oscillation Amplitude that has strengthened, thus pneumatic efficiency reduced.
Summary of the invention
At the existing shortcoming of fluid director in the centrifugal compressor in the prior art, the utility model provides a kind of novel fluid director, and described fluid director is arranged on multistage centrifugal compressor, the jointing place of adjacent two stage compression unit, described fluid director mainly comprises guide ring, radial rib sheet and fitting seat; Some radial rib sheets are circumferentially uniform along fitting seat, are fixed on the fitting seat, are used to support the guide ring that is arranged on its top.
Further, described radial rib sheet is a flake structure.
Further, described fluid director comprises a plurality of guide rings.
Further, described fitting seat is provided with the installation screw, is used for fluid director is fixed on multistage centrifugal compressor.
Further, described guide ring, radial rib sheet and fitting seat are one-body molded by forging type.
Further, described guide ring, the radial rib sheet is also fixedlyed connected by welding manner with fitting seat.
Further, described fluid director is installed on gas enters subordinate's compression unit by higher level's compression unit the left wall of passage.
The utility model has absorbed the advantage of traditional guide ring, promptly between upper level and next stage compression unit, adopt fluid director as usual, reduce pressure gradient, help gas with littler aerodynamic loss, turning enters the next stage impeller, overcome the shortcoming of above-mentioned traditional guide ring simultaneously, abandoned import bolt mounting type, and adopted the quadrature water conservancy diversion rectifier of an integral installation.
Description of drawings
Fig. 1 is the centrofugal compressor structure schematic representation;
Fig. 2 is a fluid director structural representation in the prior art;
Fig. 3 is fluid director scheme of installation in centrifugal compressor in the utility model;
Fig. 4 is a fluid director structural representation in the utility model;
Fig. 5 be among Fig. 4 A to view;
Fig. 6 is an another kind of fluid director structural representation in the utility model;
Fig. 7 is the third fluid director structural representation in the utility model.
Embodiment
Use quadrature water conservancy diversion rectifier to replace fluid director of the prior art that gas is carried out water conservancy diversion in the utility model.Identical with the fluid director 3 described in Fig. 1, the fluid director among the present invention also is arranged on the jointing place of the adjacent two stage compression of multistage centrifugal compressor unit, and gas is entering into the next stage compression unit by the upper level compression unit through behind the water conservancy diversion of fluid director 8.
As shown in Fig. 3,4,5, fluid director 8 is arranged on multistage centrifugal compressor in the utility model, the jointing place of adjacent two stage compression unit, and air-flow enters into the next stage compression unit by the upper level compression unit after through the water conservancy diversion of handing over water conservancy diversion rectifier 8; Gas flow direction is a direction shown in the arrow among Fig. 3.Quadrature water conservancy diversion rectifier 8 mainly comprises guide ring 31, radial rib sheet 81 and fitting seat 82.Guide ring 31 is the circular ring of circular arc for radial cross section.As shown in Figure 5, some radial rib sheets 81 are circumferentially uniform along fitting seat 82, are fixed on the fitting seat 82, are used to support the guide ring 31 that is arranged on its top.Fitting seat 82 is provided with the installation screw, is used for fluid director 8 is fixed on multistage centrifugal compressor.Guide ring 31 in the fluid director 8, radial rib sheet 81 and fitting seat 82 can be one-body molded by forging type, also can be assembled together by fixedly connected modes such as welding.
As shown in Figure 3, whole water conservancy diversion rectifier 8 is installed on gas enters subordinate's compression unit by higher level's compression unit the left wall 51 of passage by bolt 83.
As shown in Fig. 6,7, guide ring 31 quantity that are arranged on the radial rib sheet 82 can be set to many rings according to actual conditions.
Fluid director in the utility model has following advantage: 1, employing and mounting base casting all-in-one-piece radial rib sheet supports, and has avoided being used in the prior art support the obstruction of guide ring clamping bolt to air-flow path; 2, the radial rib sheet is supported on the guide ring middle part, and has covered guide ring grain direction more than half zone, forms highly stable supporting structure, thereby has avoided the unstability shortcoming that guide ring cantilever beam type supporting way is had in the prior art; 3, radial rib sheet, guide ring and mounting base are cast as an one-piece element, perforate on the mounting base, whole fluid director is installed in the left wall that higher level's compression unit enters the passage of subordinate's compression unit, so construction bolt places outside the runner, not only easy for installation, and inner flow passage do not formed any stopping, favourable to pneumatic efficiency.
Claims (7)
1. fluid director, described fluid director is arranged on multistage centrifugal compressor, and the jointing place of adjacent two stage compression unit is characterized by described fluid director and mainly comprises guide ring, radial rib sheet and fitting seat; Some radial rib sheets are circumferentially uniform along fitting seat, are fixed on the fitting seat, are used to support the guide ring that is arranged on its top.
2. fluid director described in claim 1 is characterized by, and described radial rib sheet is a flake structure.
3. fluid director described in claim 1 is characterized by, and described fluid director comprises a plurality of guide rings.
4. fluid director described in claim 1 is characterized by, and described fitting seat is provided with the installation screw.
5. fluid director described in claim 1 is characterized by, described guide ring, and radial rib sheet and fitting seat are one-body molded by forging type.
6. fluid director described in claim 1 is characterized by, described guide ring, and the radial rib sheet is also fixedlyed connected by welding manner with fitting seat.
7. fluid director described in claim 1 is characterized by, and described fluid director is installed on gas enters subordinate's compression unit by higher level's compression unit the left wall of passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200890240U CN201982377U (en) | 2011-03-30 | 2011-03-30 | Air guider for centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200890240U CN201982377U (en) | 2011-03-30 | 2011-03-30 | Air guider for centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201982377U true CN201982377U (en) | 2011-09-21 |
Family
ID=44609839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200890240U Expired - Fee Related CN201982377U (en) | 2011-03-30 | 2011-03-30 | Air guider for centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201982377U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192191A (en) * | 2011-03-30 | 2011-09-21 | 宋波 | Orthogonal guide rectifier |
| CN113653649A (en) * | 2021-09-09 | 2021-11-16 | 江苏大学 | Interstage flow channel structure for improving performance of secondary impeller of multi-stage pump |
-
2011
- 2011-03-30 CN CN2011200890240U patent/CN201982377U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192191A (en) * | 2011-03-30 | 2011-09-21 | 宋波 | Orthogonal guide rectifier |
| CN102192191B (en) * | 2011-03-30 | 2013-07-31 | 宋波 | Orthogonal guide rectifier |
| CN113653649A (en) * | 2021-09-09 | 2021-11-16 | 江苏大学 | Interstage flow channel structure for improving performance of secondary impeller of multi-stage pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20180330 |