CN214837350U - Centrifugal compressor impeller fixing device - Google Patents
Centrifugal compressor impeller fixing device Download PDFInfo
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- CN214837350U CN214837350U CN202121335344.XU CN202121335344U CN214837350U CN 214837350 U CN214837350 U CN 214837350U CN 202121335344 U CN202121335344 U CN 202121335344U CN 214837350 U CN214837350 U CN 214837350U
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- impeller
- head cap
- socket head
- hexagon socket
- motor rotor
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Abstract
A centrifugal compressor impeller fixing device belongs to the technical field of compressors. The utility model provides a current compressor impeller fixing device for fix the impeller in the pivot, change the hub runner structure, cause the problem of influence to the efficiency of compressor. The utility model discloses a locking screw, hexagon socket head cap screw, impeller and electric motor rotor, the impeller passes through hexagon socket head cap screw to be fixed on electric motor rotor, open threaded hole at the hexagon socket head cap screw front end, on hexagon socket head cap screw including locking screw passes through the screw hole and fixes, the continuous smooth transition of outer profile surface camber of hexagon socket head cap screw constitutes second impeller import wheel hub runner, the continuous smooth transition of outer profile surface camber of locking screw, the outer profile surface of hexagon socket head cap screw and the outer profile surface smooth connection of locking screw constitute first impeller import wheel hub runner. Through the utility model discloses an impeller fixing device has kept the continuous smooth transition structure of impeller import camber, has improved the aerodynamic performance of impeller import, has improved the efficiency of compressor.
Description
Technical Field
The utility model relates to a compressor wheel fixing device belongs to compressor technical field.
Background
The micro generator set has the advantages of compact structure, small volume, light weight, good flexibility and the like, is not limited by time, place and environment, and has important significance in the field of hybrid electric vehicles and military equipment. At present, the working speed of a micro generator set can reach 60000RPM (revolution per minute) or even higher, a compressor which is a core component of the micro generator set, a turbine and a generator commonly share the same rotor, namely, an impeller of the compressor is suspended on a rotor shaft of a motor, and the compressor has higher efficiency while the reliability is high in the working process. High efficiency compressors also have strict requirements on the design of the inlet hub flow passage of the impeller, and smooth transition of the curvature of the inlet flow passage is desirable, but in order to better fix the impeller on the rotor shaft, the structure of the hub flow passage usually has to be changed, thus having a certain influence on the efficiency of the compressor.
In view of the above, there is a need for a compressor impeller fixing device that can fix the impeller to the rotor shaft without affecting the efficiency of the compressor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a current compressor impeller fixing device fix the impeller on the rotor shaft for better, cause the change to the hub runner structure, cause the problem of certain influence to the efficiency of compressor, and then disclose "a centrifugal compressor impeller fixing device". A brief summary of the present invention is provided below in order to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.
The technical scheme of the utility model:
the utility model provides a centrifugal compressor impeller fixing device, including locking screw, hexagon socket head cap screw, impeller and electric motor rotor, the impeller passes through hexagon socket head cap screw to be fixed at electric motor rotor's axle head, open threaded hole at hexagon socket head cap screw front end center, locking screw passes through the threaded hole and fixes on hexagon socket head cap screw, the continuous smooth transition of hexagon socket head cap screw outer profile surface camber constitutes second impeller import hub runner, the continuous smooth transition of outer profile surface camber of locking screw, hexagon socket head cap screw's outer profile surface and locking screw's outer profile surface smooth connection constitute first impeller import hub runner.
Furthermore, the center of the impeller is sequentially provided with a first stepped hole, a second stepped hole and a third stepped hole, the outer cylindrical surface at one end of the motor rotor is matched and installed with the inner cylindrical surface of the third stepped hole, and the rod end of the inner hexagonal bolt penetrates through the first stepped hole and the second stepped hole to be in threaded connection with the motor rotor.
Furthermore, a groove is formed in the impeller, a protrusion is arranged at the end of the motor rotor, and the groove of the impeller and the protrusion of the motor rotor are installed in a matched mode.
Further, the groove is an annular groove, the protrusion is an annular protrusion, and the annular protrusion and the annular groove are installed in a matched mode.
The utility model has the advantages that:
1. the utility model discloses a centrifugal compressor impeller fixing device, when fixing the impeller on the motor rotor, do not change the wheel hub passageway, constitute centrifugal compressor impeller import wheel hub runner by the outer profile face of hexagon socket head cap screw and locking screw, remain the smooth transition structure that impeller import camber is continuous, improved the aerodynamic performance of impeller import, improved the efficiency of compressor;
2. the utility model discloses a centrifugal compressor impeller fixing device, the annular groove of impeller back processing and the protruding cooperation installation of annular of electric motor rotor tip processing have realized rotor and the control of the radial direction of impeller in the course of the work, guarantee the cooperation stability of high-speed rotatory impeller and rotor.
Drawings
FIG. 1 is a schematic view of a compressor wheel mounting arrangement;
FIG. 2 is a schematic view of the impeller structure;
FIG. 3 is a schematic view of a socket head cap screw;
FIG. 4 is a schematic view of a locking screw;
FIG. 5 is a perspective view of the impeller;
fig. 6 is a schematic view of a hub flow passage of an impeller mechanism formed by a hexagon socket head cap screw and a locking screw.
In the figure, 1-locking screw, 2-inner hexagon bolt, 3-impeller, 4-motor rotor, 11-first step hole, 12-second step hole, 13-third step hole, 21-first impeller inlet hub flow channel, 22-second impeller inlet hub flow channel, 41-groove and 42-bulge.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It should be understood that the description is intended to be exemplary, and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 6, and the centrifugal compressor impeller fixing device of the present embodiment includes a locking screw 1, an inner hexagon bolt 2, an impeller 3 and a motor rotor 4, wherein the impeller 3 is fixed at the shaft end of the motor rotor 4 through the inner hexagon bolt 2, a threaded hole is opened at the center of the front end of the inner hexagon bolt 2, the locking screw 1 is fixed on the inner hexagon bolt 2 through the threaded hole, the curvature of the outer contour surface of the inner hexagon bolt 2 is continuously and smoothly transited to form a second impeller inlet hub runner 22, the curvature of the outer contour surface of the locking screw 1 is continuously and smoothly transited, the outer contour surface of the inner hexagon bolt 2 is smoothly connected with the outer contour surface of the locking screw 1 to form a first impeller inlet hub runner 21, the inner hexagon bolt 2 fixes the impeller 3 on the motor rotor 4, and the first impeller inlet hub runner 21 and the second impeller inlet hub runner 22 formed by the outer contour surfaces of the locking screw 1 and the inner hexagon bolt 2 retain the impeller 3 inlet curvature The smooth transition structure with continuous rate improves the pneumatic performance of the inlet of the impeller 3 and improves the efficiency of the compressor.
The second embodiment is as follows: referring to fig. 1 to 6, in the centrifugal compressor impeller fixing device of the present embodiment, a first stepped hole 11, a second stepped hole 12 and a third stepped hole 13 are sequentially formed in the center of the impeller 3, an outer cylindrical surface at one end of the motor rotor 4 is installed in cooperation with an inner cylindrical surface of the third stepped hole 13, and a rod end of the hexagon socket head cap screw 2 penetrates through the first stepped hole 11 and the second stepped hole 12 to be in threaded connection with the motor rotor 4.
The third concrete implementation mode: the embodiment is described with reference to fig. 1 to 6, and a centrifugal compressor impeller fixing device of the embodiment is characterized in that a groove 41 is processed on the impeller 3, a protrusion 42 is arranged at the end of the motor rotor 4, the groove 41 of the impeller 3 is installed in cooperation with the protrusion 42 of the motor rotor 4, the groove 41 is an annular groove, the protrusion 42 is an annular protrusion, the annular protrusion is installed in cooperation with the annular groove, the annular groove at the back of the impeller 3 is installed in cooperation with the annular protrusion at the end of the motor rotor 4, the radial direction of the impeller 3 and the motor rotor 4 can be controlled, and the matching stability of the impeller 3 and the motor rotor 4 rotating at high speed is ensured.
This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.
Claims (4)
1. A centrifugal compressor impeller fixing device which is characterized in that: including locking screw (1), hexagon socket head cap screw (2), impeller (3) and electric motor rotor (4), the axle head in electric motor rotor (4) is fixed through hexagon socket head cap screw (2) in impeller (3), open threaded hole at hexagon socket head cap screw (2) front end center, on hexagon socket head cap screw (2) including locking screw (1) passes through the screw hole is fixed, hexagon socket head cap screw (2) outer profile surface camber is smooth in succession and is passed through and constitute second impeller import wheel hub runner (22), the continuous smooth transition of outer profile surface camber of locking screw (1), the outer profile surface of hexagon socket head cap screw (2) and the outer profile surface smooth connection of locking screw (1) constitute first impeller import wheel hub runner (21).
2. A centrifugal compressor impeller securement device as recited in claim 1, wherein: the motor rotor is characterized in that a first stepped hole (11), a second stepped hole (12) and a third stepped hole (13) are sequentially formed in the center of the impeller (3), an outer cylindrical surface at one end of the motor rotor (4) is installed in a matched mode with an inner cylindrical surface of the third stepped hole (13), and the rod end of the inner hexagonal bolt (2) penetrates through the first stepped hole (11) and the second stepped hole (12) to be connected with the motor rotor (4) in a threaded mode.
3. A centrifugal compressor impeller securement device as recited in claim 2, wherein: a groove (41) is machined in the impeller (3), a protrusion (42) is arranged at the end of the motor rotor (4), and the groove (41) of the impeller (3) and the protrusion (42) of the motor rotor (4) are installed in a matched mode.
4. A centrifugal compressor impeller securement device as recited in claim 3, wherein: the groove (41) is an annular groove, the bulge (42) is an annular bulge, and the annular bulge is installed in a matched mode with the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121335344.XU CN214837350U (en) | 2021-06-16 | 2021-06-16 | Centrifugal compressor impeller fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121335344.XU CN214837350U (en) | 2021-06-16 | 2021-06-16 | Centrifugal compressor impeller fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214837350U true CN214837350U (en) | 2021-11-23 |
Family
ID=78807254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121335344.XU Active CN214837350U (en) | 2021-06-16 | 2021-06-16 | Centrifugal compressor impeller fixing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214837350U (en) |
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2021
- 2021-06-16 CN CN202121335344.XU patent/CN214837350U/en active Active
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