CN209818396U - Spacer assembly for multistage centrifugal compressor - Google Patents
Spacer assembly for multistage centrifugal compressor Download PDFInfo
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- CN209818396U CN209818396U CN201920196353.1U CN201920196353U CN209818396U CN 209818396 U CN209818396 U CN 209818396U CN 201920196353 U CN201920196353 U CN 201920196353U CN 209818396 U CN209818396 U CN 209818396U
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Abstract
The utility model relates to a centrifugal compressor technical field, concretely relates to spacing subassembly for multistage centrifugal compressor, including inner baffle and baffle body, the inner baffle includes the baffle, the baffle surface sets gradually curved blade group and straight blade group towards the central direction, straight blade group includes that a plurality of circumference evenly distributed around the through-hole just connect perpendicularly on the straight blade group on the baffle, straight blade is fan-shaped, the fan-shaped limit of straight blade is fixed on the baffle, the surface of baffle and straight blade junction is convex; the spacing component also comprises an annular body which is arranged around the rotating shaft and used for fixing the opposite sides of the fan-shaped edges of the straight blades; the adjacent straight blades, the partition plate and the annular body form straight blade runners which are not interfered with each other; the utility model has the advantages that: through the arrangement of the straight blade flow channel, the problems of gas channeling, gas flow loss, gas flow pulsation and separation caused by the fact that gas directly enters the next-stage impeller from the bent blade group are solved.
Description
Technical Field
The utility model relates to a centrifugal compressor technical field, concretely relates to interval subassembly for multistage centrifugal compressor.
Background
The application range of the centrifugal compressor is more and more extensive in the present society, and the multistage centrifugal compressor gradually occupies the market. The multistage centrifugal compressor adopts a plurality of impellers to work simultaneously, gas is transferred into a next-stage impeller after being accelerated and pressurized by the first-stage impeller, the speed of the gas coming out of the first-stage impeller can reach 200-300 m/s, the gas entering the condenser does not need high kinetic energy, generally, a multi-purpose backflow element is arranged between the impellers of the multistage centrifugal compressor, the flow of the gas flow is changed from radial flow leaving the axis direction to radial flow towards the axis direction by using blade type drainage, and the gas flow is bent by about 180 degrees. In the prior art, the element of the type has a single function, a single-row blade design is mostly adopted, a flow channel is too short, a blank area is large, and a drainage effect is poor; some adopt the arrangement of the multi-row bent blade, the structure is complicated, the processing and casting are difficult in the process; the gas is easy to generate cyclone in the flow channel, which affects the smooth movement of the whole flow field and generates unnecessary flow loss.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to solve the technical problems that: the spacing assembly for the multistage centrifugal compressor has the advantages of good drainage effect, small air flow loss and capability of avoiding gas from generating cyclone.
In order to solve the technical problem, the utility model discloses a technical scheme be: the spacing component is arranged between two-stage impellers of the multistage centrifugal compressor and comprises an inner partition plate and a partition plate body, wherein the center parts of the partition plate body and the inner partition plate are respectively provided with a through hole for a rotating shaft to pass through; the inner partition plate comprises a partition plate, a bent blade group and a straight blade group, and the bent blade group and the straight blade group are sequentially arranged on the surface of the partition plate towards the center direction;
the curved blade group comprises a plurality of curved blades which are uniformly distributed around the circumference of the through hole and are vertically connected to the partition plate, the curved blades are arc-shaped, and a curved blade flow passage is formed by the adjacent curved blades, the partition plate and the partition plate body;
the straight blade group comprises a plurality of straight blades which are uniformly distributed around the circumference of the through hole and are vertically connected to the partition plate, the straight blades are fan-shaped, the fan-shaped edges of the straight blades are fixed on the partition plate, and the surface of the joint of the partition plate and the straight blades is arc-shaped;
the spacing component also comprises an annular body which is arranged around the rotating shaft and used for fixing the opposite sides of the fan-shaped edges of the straight blades;
the adjacent straight blades, the partition plate and the annular body form a straight blade runner; the bent blade flow passage is communicated with the straight blade flow passage;
the adjacent straight blades form the side walls of the straight blade flow passages, the annular body forms the top walls of the straight blade flow passages, and the partition plates form the bottom walls of the straight blade flow passages.
Further, in the above-mentioned spacing assembly for a multistage centrifugal compressor, the number of the curved blades is equal to that of the straight blades.
Further, in the above-mentioned spacer assembly for a multistage centrifugal compressor, each of the straight blades is disposed between adjacent curved blades.
Further, in the above spacer assembly for a multistage centrifugal compressor, the length of the curved blade flow channel is greater than the length of the straight blade.
Further, in the above spacer assembly for a multistage centrifugal compressor, the inner side surface of the annular body is connected to the straight blade, and the opposite outer side surface is provided with an annular step for positioning the partition plate body, and the central axis of the annular step coincides with the central axis of the through hole.
Further, in the above mentioned spacer assembly for a multistage centrifugal compressor, the spacer body is provided with a threaded hole for connecting an inner spacer; the bent blade is provided with a bolt through hole corresponding to the threaded hole; the partition plate is provided with a counter bore which corresponds to the threaded hole.
Further, in the above spacer assembly for a multistage centrifugal compressor, the partition plate, the curved blade group and the straight blade group are integrally formed.
Furthermore, in the above spacer assembly for a multistage centrifugal compressor, an annular U groove is formed on the circumferential surface of the spacer body, an air supply hole is formed in the side wall of the annular U groove close to the curved blade, and the air supply hole is annularly formed in the side wall of the annular U groove around the through hole and communicated with each curved blade flow passage; the central axis of the air supply hole and the axis of the rotating shaft form an angle of 45 degrees.
The utility model has the advantages that: firstly, the curved blade flow channel is arc-shaped, namely the intersection line of the curved blade and the partition plate is arc-shaped, and the arc-shaped curved blade flow channel has the advantages that the arc is longer than the drainage path of linear gas, and the drainage of the straight blade flow channel is added, so that the drainage flow channel of the gas is further lengthened, and the problem of poor drainage effect caused by over-short gas drainage is solved;
secondly, because the adjacent straight blades form the side wall of the straight blade runner, the annular body forms the top wall of the straight blade runner, and the partition plate forms the bottom wall of the straight blade runner, the arrangement ensures that non-interfering channels are formed among the straight blade runners, therefore, gas can not flow in series through the straight blade runners, thereby solving the phenomena of gas channeling, gas pulsation and separation caused by the fact that the gas directly flows out from the bent blade runner and directly enters the next-stage impeller in the axial direction;
finally, the surface of the joint of the partition board and the straight blade is arc-shaped, namely the bottom wall of the straight blade flow channel is arc-shaped; therefore, the gas flowing in the straight blade flow passage does not generate the loss and the pulsation of the gas flow due to the sudden change of the flow passage, and the gas flow is smoothly transited due to the arc-shaped bottom wall of the straight blade flow passage, so that the gas is smoothly guided in the whole process.
Drawings
Fig. 1 is a schematic structural view of a spacer assembly for a multistage centrifugal compressor according to an embodiment of the present invention;
FIG. 2 is an isometric view of a spacer assembly for a multistage centrifugal compressor according to an embodiment of the present invention;
FIG. 3 is a front view of an inner baffle of a spacer assembly for a multistage centrifugal compressor according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a front view of a baffle body of a spacer assembly for a multistage centrifugal compressor according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;
description of reference numerals: 1. an inner partition plate; 2. a partition plate; 3. bending the blade; 4. a straight blade; 5. an annular body;
6. an annular step; 7. a separator body; 8. an annular U-shaped groove; 9. air hole supplement; 10. a vaneless diffuser; 11. a counter bore; 12. a bolt through hole; 13. a threaded hole; 14. and (4) bending.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The utility model discloses the most crucial design lies in: through setting up the straight blade runner of mutual noninterference, and the diapire of straight blade runner is arc to solve the direct gas channeling that comes out directly to the next stage impeller axial from curved blade runner of gas, the problem of air loss, air current pulsation, separation.
Referring to fig. 1 to 6, the present invention provides a spacer assembly for a multistage centrifugal compressor, the spacer assembly is disposed between two stages of impellers of the multistage centrifugal compressor, the spacer assembly includes an inner spacer 1 and a spacer body 7, and a through hole for a rotating shaft to pass through is disposed at the center of each of the spacer body 7 and the inner spacer 1; the inner partition plate 1 comprises a partition plate 2, a bent blade group and a straight blade group, wherein the bent blade group and the straight blade group are sequentially arranged on the surface of the partition plate 2 towards the center direction;
the curved blade group comprises a plurality of curved blades 3 which are uniformly distributed around the circumference of the through hole and are vertically connected to the partition plate 2, the curved blades 3 are arc-shaped, and a curved blade flow channel is formed by the adjacent curved blades 3, the partition plate 2 and the partition plate body 7;
the straight blade group comprises a plurality of straight blades 4 which are uniformly distributed around the circumference of the through hole and are vertically connected to the partition board 2, the straight blades 4 are fan-shaped, the fan-shaped edges of the straight blades 4 are fixed on the partition board 2, and the surface of the joint of the partition board 2 and the straight blades 4 is arc-shaped;
the spacing component also comprises an annular body 5 which surrounds the rotating shaft and is used for fixing the opposite sides of the fan-shaped sides of the straight blades 4;
the adjacent straight blades 4, the partition plate 2 and the annular body 5 form a straight blade flow channel; the bent blade flow passage is communicated with the straight blade flow passage;
the adjacent straight blades 4 form the side walls of the straight blade flow passage, the annular body 5 forms the top wall of the straight blade flow passage, and the partition plate 2 forms the bottom wall of the straight blade flow passage.
The utility model discloses a working process: the gas comes out from the previous-stage impeller, firstly passes through the vaneless diffuser 10 for diffusion, then enters the bend 14 formed by the left side of the inner partition plate 1 and the adjusting shell, then enters the bent blade flow passage arranged between the inner partition plate 1 and the partition plate body 7, the gas does not flow out from the bent blade flow passage and directly enters the next-stage impeller in the axial direction, but firstly passes through the straight blade flow passage communicated with the bent blade flow passage, and finally the gas flows out from the straight blade flow passage and enters the next-stage impeller in the axial direction.
The utility model has the advantages that: firstly, the curved blade flow channel is arc-shaped, namely the intersection line of the curved blade and the partition plate is arc-shaped, and the arc-shaped curved blade flow channel has the advantage that the arc is longer than the drainage path of linear gas, so that the problem of poor drainage effect caused by over-short gas drainage is solved; the adjacent straight blades form the side wall of the straight blade runner, the annular body forms the top wall of the straight blade runner, and the partition plate forms the bottom wall of the straight blade runner; thirdly, the surface of the joint of the partition board and the straight blade is arc-shaped, namely the bottom wall of the straight blade flow channel is arc-shaped; therefore, the gas flowing in the straight blade flow passage does not generate the loss and the pulsation of the gas flow due to the sudden change of the flow passage, and the gas flow is smoothly transited due to the arc-shaped bottom wall of the straight blade flow passage, so that the gas is smoothly guided in the whole process.
Further, in the above-mentioned spacing assembly for a multistage centrifugal compressor, the number of the curved blades 3 is equal to that of the straight blades 4.
From the above description, through setting up straight blade and curved blade equal in quantity for curved blade runner equals with straight blade runner passageway quantity, and the gas that goes out from every curved blade runner can both be followed the straight blade runner that corresponds and go out, thereby has guaranteed that the gas drainage is gentler.
Further, in the above-mentioned spacing assembly for a multistage centrifugal compressor, each of the straight blades 4 is disposed between adjacent curved blades 3.
As can be seen from the above description, the smoothness of the gas flow is ensured by correspondingly arranging one straight blade between the adjacent curved blades 3, and most preferably, one straight blade is correspondingly arranged between the adjacent curved blades.
Further, in the above-mentioned spacer assembly for a multistage centrifugal compressor, the length of the curved blade flow channel is greater than the length of the straight blade 4.
From the above description, it can be seen that by setting the length of the curved blade flow channel to be greater than the length of the straight blade, a sufficient flow guiding length of the gas is ensured, and the most preferable length of the curved blade flow channel is 2 times the length of the straight blade flow channel.
Further, in the above spacer assembly for a multistage centrifugal compressor, the inner side surface of the annular body 5 is connected with the straight blades 4, the opposite outer side surface is provided with an annular step 6 for positioning the partition plate body 7, and the central axis of the annular step 6 coincides with the central axis of the through hole.
As can be seen from the above description, the annular body is provided with the annular step for positioning the partition body, and the central axis of the annular step coincides with the central axis of the through hole, so that the coaxiality of the inner partition and the partition body is ensured, the gas flow rate entering each curved blade flow passage is the same, the gas flow rate exiting each straight blade flow passage is the same, and the gas smoothly enters the next-stage impeller.
Further, in the above-mentioned spacing assembly for a multistage centrifugal compressor, the partition body 7 is provided with a threaded hole 13 for connecting the inner partition 1; the bent blade 3 is provided with a bolt through hole 12 corresponding to the threaded hole 13; the partition board 2 is provided with a counter bore 11 corresponding to the threaded hole 13.
As can be seen from the above description, the bolt sequentially passes through the counter bore 11 and the threaded through hole to be in threaded connection with the threaded hole, so as to lock the inner partition plate 1 on the partition plate body 7; through be equipped with on curved blade 3 with the corresponding bolt through-hole 12 that sets up of screw hole 13, its advantage lies in: the bolt is prevented from blocking the airflow, so that the air is ensured to flow in the curved blade flow channel without obstruction; through be equipped with on the baffle with the counter bore that the screw hole corresponds the setting, its advantage lies in: the cup head of the bolt can be stored in the counter bore and cannot be exposed out of the surface of the partition plate, so that the air flow loss caused by the fact that air passes through the cup head of the bolt is avoided.
Further, in the above-mentioned spacer assembly for a multistage centrifugal compressor, the partition plate 2, the curved blade group and the straight blade group are integrally formed.
From the above description, the baffle, the bent blade group and the straight blade group are integrally formed, so that the processing difficulty of the inner baffle is reduced, the processing precision of the inner baffle is ensured, and the material cut off by each component due to separate processing is also reduced.
Further, in the above spacer assembly for a multistage centrifugal compressor, an annular U-shaped groove 8 is provided on the circumferential surface of the spacer body 7, an air supply hole 9 is provided on the side wall of the annular U-shaped groove 8 close to the curved blade 3, the air supply hole 9 is annularly provided on the side wall of the annular U-shaped groove 8 around the through hole and is communicated with each curved blade flow passage; the central axis of the air supply hole 9 and the axis of the rotating shaft form an angle of 45 degrees.
From the above description, the partition plate 2 assembly not only carries the flow guiding of the gas curved channel 14 from the previous stage impeller, but also carries the air supplement before the air intake of the next stage impeller; the annular U-shaped groove 8 and a volute arranged on the shell form an independent economizer return air channel, so that the economical air return is fully utilized; the air supplementing holes 9 are formed in the side wall, close to the bent blades 3, of the annular U-shaped groove 8, the air supplementing holes 9 are arranged on the side wall of the annular U-shaped groove 8 in a surrounding mode around the through holes and are communicated with the bent blade flow passages, and therefore air can be supplemented to each bent blade flow passage uniformly; the central axis of the air supplementing hole and the axis of the rotating shaft form a 45-degree angle, so that the speed direction of the gas entering the bent blade flow passage through the air supplementing hole is consistent with the speed direction of the gas going out of the bent blade flow passage from the upper-stage impeller, the airflow collision caused by the speed incongruity of the two gas streams is avoided, and the generation of cyclone caused by the collision of the gas is avoided.
Further, in the above spacer assembly for a multistage centrifugal compressor, the top wall of the annular body 5 constituting the straight blade flow channel is circular arc-shaped.
As can be seen from the above description, the top wall is arc-shaped, so that the air flow is guided more smoothly in the straight blade flow channel, and the air is guided smoothly in the whole process.
Example one
A spacing component for a multistage centrifugal compressor is arranged between two-stage impellers of the multistage centrifugal compressor and comprises an inner partition plate 1 and a partition plate body 7, wherein the center parts of the partition plate body 7 and the inner partition plate 1 are respectively provided with a through hole for a rotating shaft to pass through; the inner partition plate 1 comprises a partition plate 2, a bent blade group and a straight blade group, wherein the bent blade group and the straight blade group are sequentially arranged on the surface of the partition plate 2 towards the center direction;
the curved blade group comprises a plurality of curved blades 3 which are uniformly distributed around the circumference of the through hole and are vertically connected to the partition plate 2, the curved blades 3 are arc-shaped, and a curved blade flow channel is formed by the adjacent curved blades 3, the partition plate 2 and the partition plate body 7;
the straight blade group comprises a plurality of straight blades 4 which are uniformly distributed around the circumference of the through hole and are vertically connected to the partition board 2, the straight blades 4 are fan-shaped, the fan-shaped edges of the straight blades 4 are fixed on the partition board 2, and the surface of the joint of the partition board 2 and the straight blades 4 is arc-shaped;
the spacing component also comprises an annular body 5 which surrounds the rotating shaft and is used for fixing the opposite sides of the fan-shaped sides of the straight blades 4;
the adjacent straight blades 4, the partition plate 2 and the annular body 5 form a straight blade flow channel; the bent blade flow passage is communicated with the straight blade flow passage;
the adjacent straight blades 4 form the side walls of the straight blade flow channel, the annular body 5 forms the top wall of the straight blade flow channel, and the partition plate 2 forms the bottom wall of the straight blade flow channel.
The advantages of the above-described spacer assembly for a multistage centrifugal compressor are as follows: firstly, the curved blade flow channel is arc-shaped, namely the intersection line of the curved blade and the partition plate is arc-shaped, and the arc-shaped curved blade flow channel has the advantages that the arc is longer than the drainage path of linear gas, and the drainage of the straight blade flow channel is added, so that the drainage flow channel of the gas is further lengthened, and the problem of poor drainage effect caused by over-short gas drainage is solved;
secondly, because the adjacent straight blades form the side wall of the straight blade runner, the annular body forms the top wall of the straight blade runner, and the partition plate forms the bottom wall of the straight blade runner, the arrangement ensures that non-interfering channels are formed among the straight blade runners, therefore, gas can not flow in series through the straight blade runners, thereby solving the phenomena of gas channeling, gas pulsation and separation caused by the fact that the gas directly flows out from the bent blade runner and directly enters the next-stage impeller in the axial direction;
finally, the surface of the joint of the partition board and the straight blade is arc-shaped, namely the bottom wall of the straight blade flow channel is arc-shaped; therefore, the gas flowing in the straight blade flow passage does not generate the loss and the pulsation of the gas flow due to the sudden change of the flow passage, and the gas flow is smoothly transited due to the arc-shaped bottom wall of the straight blade flow passage, so that the gas is smoothly guided in the whole process.
In this example, the gas exits the upper stage impeller with very high kinetic energy, which is converted to potential energy using a vaneless diffuser 10 and directed through a curved path 14 into a curved blade flow path.
In this embodiment, the curved blades 3 and the straight blades 4 are equal in number, and through the arrangement, the curved blade flow channels are equal in number to the straight blade flow channel channels, and gas discharged from each curved blade flow channel can be discharged from the corresponding straight blade flow channel, so that gas drainage is ensured to be more gentle.
In the embodiment, each straight blade 4 is arranged between adjacent curved blades 3, and the smoothness of the gas flow is ensured by correspondingly arranging one straight blade 4 between the adjacent curved blades 3; the most preferable arrangement is that a straight blade 4 is correspondingly arranged in the middle of the adjacent bent blades 3, so that when airflow is guided to the exchange position of the two groups of blades through the bent blade flow channel, the airflow speed can be further effectively reduced, and the flow dividing effect is optimal.
Furthermore, the length of the curved blade flow channel is greater than that of the straight blade 4, and the length of the curved blade flow channel is greater than that of the straight blade 4, so that the gas has enough drainage length. The most preferred curved vane flow channel length is 2 times the length of the straight vane flow channel.
Furthermore, the inner side surface of the annular body 5 is connected with the straight blades 4, the opposite outer side surface is provided with an annular step 6 for positioning a partition plate body 7, and the central axis of the annular step 6 is superposed with the central axis of the through hole; the annular body 5 is provided with the annular step 6 for positioning the partition plate body 7, and the central axis of the annular step 6 coincides with the central axis of the through hole, so that the coaxiality of the inner partition plate and the partition plate body is ensured, the gas flow entering each bent blade flow passage is the same, the gas flow velocity from each straight blade flow passage is the same, and the gas smoothly enters the next-stage impeller.
In the embodiment, the clapboard body 7 is provided with a threaded hole 13 for connecting the inner clapboard 1; the bent blade 3 is provided with a bolt through hole 12 corresponding to the threaded hole 13; the partition board 2 is provided with a counter bore 11 corresponding to the threaded hole 13. The screw through holes are preferably uniformly distributed on the bent blades 3 around the circumference of the through holes, and the preferred number of the bolt through holes 12 is the same as that of the bent blades 3; the bolt sequentially penetrates through the counter bore 11 and the threaded through hole to be in threaded connection with the threaded hole, and the inner partition plate 1 is locked on the partition plate body 7; through be equipped with on curved blade 3 with the corresponding bolt through-hole 12 that sets up of screw hole 13, its advantage lies in: the bolt is prevented from blocking the airflow, so that the air is ensured to flow in the curved blade flow channel without obstruction; through be equipped with on the baffle with the counter bore that the screw hole corresponds the setting, its advantage lies in: the cup head of the bolt can be stored in the counter bore and cannot be exposed out of the surface of the partition plate, so that the air flow loss caused by the fact that air passes through the cup head of the bolt is avoided.
In the embodiment, the partition plate 2, the bent blade group and the straight blade group are integrally formed; the partition plate 2, the bent blade group and the straight blade group are integrally formed, so that the processing difficulty of the inner partition plate 1 is reduced, the processing precision of the inner partition plate 1 is ensured, and materials cut off due to independent processing of all parts are saved.
In this embodiment, an annular U-shaped groove 8 is formed on the circumferential surface of the partition plate body 7, an air supply hole 9 is formed in the side wall of the annular U-shaped groove 8, which is close to the curved blade 3, and the air supply hole 9 is annularly formed in the side wall of the annular U-shaped groove 8 around the through hole and is communicated with each curved blade flow passage; the central axis of the air supplementing hole 9 and the axis of the rotating shaft form an angle of 45 degrees; the baffle plate 2 assembly not only bears the flow guide of the gas bend 14 from the upper stage impeller, but also bears the air supplement before the air intake of the lower stage impeller; the annular U-shaped groove 8 and a volute arranged on the shell form an independent economizer return air channel, and an O-shaped sealing ring can be used for enhancing sealing, so that the economic return air is fully utilized; the air supplementing holes 9 are formed in the side wall, close to the bent blades 3, of the annular U-shaped groove 8, the air supplementing holes 9 are arranged on the side wall of the annular U-shaped groove 8 in a surrounding mode around the through holes and are communicated with the bent blade flow passages, and therefore air can be supplemented to each bent blade flow passage uniformly; through the arrangement that the central axis of the air supplementing hole 9 and the axis of the rotating shaft form an angle of 45 degrees, the speed direction of the gas entering the bent blade flow passage through the air supplementing hole 9 is consistent with the speed direction of the gas going out of the bent blade flow passage from the upper-stage impeller, the gas flow collision generated by the two gas flows due to the speed incongruity is avoided, and the gas cyclone generated due to the collision is avoided.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (8)
1. A spacing component for a multistage centrifugal compressor is characterized in that the spacing component is arranged between two stages of impellers of the multistage centrifugal compressor and comprises an inner partition plate and a partition plate body, and the center parts of the partition plate body and the inner partition plate are respectively provided with a through hole for a rotating shaft to pass through; the inner partition plate comprises a partition plate, a bent blade group and a straight blade group, and the bent blade group and the straight blade group are sequentially arranged on the surface of the partition plate towards the center direction;
the curved blade group comprises a plurality of curved blades which are uniformly distributed around the circumference of the through hole and are vertically connected to the partition plate, the curved blades are arc-shaped, and a curved blade flow passage is formed by the adjacent curved blades, the partition plate and the partition plate body;
the straight blade group comprises a plurality of straight blades which are uniformly distributed around the circumference of the through hole and are vertically connected to the partition plate, the straight blades are fan-shaped, the fan-shaped edges of the straight blades are fixed on the partition plate, and the surface of the joint of the partition plate and the straight blades is arc-shaped;
the spacing component also comprises an annular body which is arranged around the rotating shaft and used for fixing the opposite sides of the fan-shaped edges of the straight blades;
the adjacent straight blades, the partition plate and the annular body form a straight blade runner; the bent blade flow passage is communicated with the straight blade flow passage;
the adjacent straight blades form the side walls of the straight blade flow passages, the annular body forms the top walls of the straight blade flow passages, and the partition plates form the bottom walls of the straight blade flow passages.
2. Spacer assembly for a multistage centrifugal compressor according to claim 1, characterised in that said curved blades are equal in number to said straight blades.
3. The spacer assembly for a multistage centrifugal compressor according to claim 1, wherein each of said straight blades is disposed between adjacent curved blades.
4. The spacer assembly for a multistage centrifugal compressor of claim 1, wherein the length of the curved blade flow channel is greater than the length of the straight blade.
5. Spacer assembly for a multistage centrifugal compressor according to claim 1,
the inner side surface of the annular body is connected with the straight blades, an annular step used for positioning the partition plate body is arranged on the opposite outer side surface, and the central axis of the annular step is overlapped with the central axis of the through hole.
6. The spacer assembly for a multistage centrifugal compressor according to claim 1, wherein the spacer body is provided with a threaded hole for connecting an inner spacer; the bent blade is provided with a bolt through hole corresponding to the threaded hole; the partition plate is provided with a counter bore which corresponds to the threaded hole.
7. The spacer assembly for a multistage centrifugal compressor according to claim 1, wherein the baffle plate, the curved blade set and the straight blade set are integrally formed.
8. The spacer assembly for a multistage centrifugal compressor according to claim 1, wherein an annular U groove is formed on a circumferential surface of the spacer body, and a gas replenishing hole is formed on a side wall of the annular U groove adjacent to the curved vane, the gas replenishing hole being annularly formed on the side wall of the annular U groove around the through hole and communicating with each curved vane flow passage; the central axis of the air supply hole and the axis of the rotating shaft form an angle of 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920196353.1U CN209818396U (en) | 2019-02-14 | 2019-02-14 | Spacer assembly for multistage centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920196353.1U CN209818396U (en) | 2019-02-14 | 2019-02-14 | Spacer assembly for multistage centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209818396U true CN209818396U (en) | 2019-12-20 |
Family
ID=68873087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920196353.1U Expired - Fee Related CN209818396U (en) | 2019-02-14 | 2019-02-14 | Spacer assembly for multistage centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209818396U (en) |
-
2019
- 2019-02-14 CN CN201920196353.1U patent/CN209818396U/en not_active Expired - Fee Related
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