CN214577927U - Air cooling structure of two-stage centrifugal air compressor - Google Patents
Air cooling structure of two-stage centrifugal air compressor Download PDFInfo
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- CN214577927U CN214577927U CN202120653784.3U CN202120653784U CN214577927U CN 214577927 U CN214577927 U CN 214577927U CN 202120653784 U CN202120653784 U CN 202120653784U CN 214577927 U CN214577927 U CN 214577927U
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Abstract
The air cooling structure of the double-stage centrifugal air compressor is characterized in that cooling compressed air is led out from the middle pipeline and enters the air cooling air inlet through the air cooling air distribution pipe, the cooling compressed air uniformly enters the inner cavity of the shell through the air inlet holes on the air inlet air-homogenizing cover, cooling air passes through the gap between the motor stator and the shell and the main shaft and is uniformly discharged from the air inlet holes on the air outlet air-homogenizing cover on the other side, and the discharged air is discharged from the air cooling air outlet. Through setting up even wind device at casing both ends, with even the guide circulation in the casing of cooling air, discharge from both ends air conditioning gas outlet again, guaranteed cooling air in the inside equilibrium distribution all the time of casing, do not have the not good enough problem of local area cooling effect, through middle pipeline with partial compressed gas introduction casing in realize the cooling to motor, main shaft, journal bearing and axial bearing, improve the life of air compressor machine.
Description
Technical Field
The utility model relates to an air compressor cools off technical field, concretely relates to centrifugal air compressor's air cooling structure.
Background
At present, a centrifugal air compressor is generally designed in a motor direct-drive mode, a motor rotor and a main shaft are made into an integrated structure, a centrifugal impeller is fixedly connected to the end of the main shaft, and the impeller is arranged in a volute. Under the super-high speed rotation of the motor rotor, the impeller drives gas to rotate at high speed to interact with the volute to generate high-pressure and large-flow air which is supplied to a fuel cell engine and used for the generation of electrochemical reaction inside a fuel cell stack, wherein the bearing supports the rotor (including a main shaft and the impeller) integrated rotating part to rotate at high speed.
Disclosure of Invention
Centrifugal air compressors often adopt a rotational speed control implementation mode of ultrahigh rotational speed (above 80000 Rpm) to improve the pressure and flow rate of output air, and ultrahigh-speed rotors also bring heat dissipation and cooling problems. Therefore, when the air compressor works, the motor stator is electrified to run and the rotor rotates at a high speed to generate a large amount of heat, the heat is accumulated inside the air compressor to influence the running state of the motor stator, the control circuit of the motor stator and the rotor of the air compressor, and the heat dissipation must be realized timely and effectively. Simultaneously, the heat dissipation is inhomogeneous will make the rotor produce temperature gradient and the thermal bending deformation appears, and to the rotor under the high-speed rotation state, thermal bending deformation will cause the rotor vibration and make whole air compressor machine the vibration condition appear, and when serious, the air compressor machine structure will suffer destruction, causes the air compressor machine to damage even personnel's damage. And the bipolar centrifugal air compressor has higher requirements on the rotation of the rotor.
The casing is often led into the cooling gas of the same way among the prior art and is discharged from the export of the casing other end again to the casing inside, but this method leads to very easily that the cooling gas directly flows and the gaseous flow direction is whole to be partial to the export and let the unable better realization cooling of the position of keeping away from the exit end from the great position in clearance, how can high-efficient balanced realization air compressor machine inside cooling, is the problem that needs the solution at present stage.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, an object of the present invention is to provide an air cooling structure of a two-stage centrifugal air compressor, the centrifugal air compressor includes a housing, a motor stator, a main shaft, a compression device disposed at an outer end of the main shaft, and an air cooling structure disposed in the housing, wherein the motor stator and the main shaft are embedded in the housing; the two ends of the shell are provided with a cold air inlet and a cold air outlet, the two ends of the inner cavity of the shell are both provided with air homogenizing devices, the air homogenizing devices are arranged between the cold air inlet and the cold air outlet, and the air homogenizing devices are provided with a plurality of air inducing holes which are communicated with the cold air inlet and the cold air outlet;
the motor stator and the main shaft are arranged between the air homogenizing devices at the two ends, and the two ends of the main shaft penetrate through the air homogenizing devices.
Furthermore, both ends of the spindle of the centrifugal air compressor can be provided with compression devices which are communicated through an intermediate pipeline.
Further, the cold air inlet is connected with the middle pipeline through an air-cooling air distribution pipe.
Further, the cold air inlet is connected with the middle pipeline through an air-cooling air distribution pipe.
Furthermore, the even wind device includes even wind lid of air inlet and even wind lid of air-out.
Further, the air inlet air-homogenizing cover and the air outlet air-homogenizing cover are both back plates integrally formed with the shell.
Furthermore, a plurality of air inducing holes 7 are symmetrically arranged on the air inlet and outlet air-homogenizing covers.
Furthermore, the distribution diameter of the air guiding holes on the air inlet air-homogenizing cover is smaller than that of the air guiding holes on the air outlet air-homogenizing cover.
Furthermore, the cooling compressed gas is led out from the middle pipeline and enters the cold air inlet through the air cooling gas distributing pipe, the cooling compressed gas uniformly enters the inner cavity of the shell through the air inlet and air distributing cover, the cooling air passes through the gap between the motor stator and the shell and the main shaft, the cooling air is uniformly discharged from the air outlet and air distributing cover on the other side, and the discharged gas is discharged from the cold air outlet.
Furthermore, a one-way valve is arranged in the cold air outlet.
Furthermore, the number of the cold air outlets is two, and the two cold air outlets are distributed in an axisymmetric manner.
The utility model has the advantages that:
through setting up even wind device at casing both ends, with even the guide circulation in the casing of cooling air, discharge from both ends air conditioning gas outlet again, guaranteed cooling air in the inside equilibrium distribution all the time of casing, do not have the not good enough problem of local area cooling effect, through middle pipeline with partial compressed gas introduction casing in realize the cooling to motor, main shaft, journal bearing and axial bearing, improve the life of air compressor machine.
Drawings
Fig. 1 is a perspective view of the present invention;
FIG. 2 is a gas flow diagram of the present invention;
FIG. 3 is a sectional view of the air inlet end of the air conditioner of the present invention;
fig. 4 is a sectional view of the air outlet of the present invention.
Drawing reference number
The air-cooling air distribution device comprises a shell (1), a motor stator (2), a main shaft (3), an air-cooling air inlet (4), an air-cooling air outlet (5), an air-homogenizing device (6), an air-guiding hole (7), an intermediate pipeline (8) and an air-cooling air distribution pipe (9).
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings, which are provided for illustration purposes only to help understanding the present invention and are not to be construed as limiting the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout.
The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example 1
As shown in fig. 1-4, the utility model discloses an air cooling structure of a two-stage centrifugal air compressor, the centrifugal air compressor comprises a shell 1, a motor stator 2, a main shaft 3, a compression device arranged at the outer end of the main shaft 3, and an air cooling structure arranged in the shell 1, wherein the motor stator 2 and the main shaft 3 are both embedded in the shell 1; two ends of the shell 1 are provided with a cold air inlet 4 and a cold air outlet 5, the number of the cold air outlets 5 is two, the two cold air outlets 5 are axially and symmetrically distributed, and one-way valves are arranged in the cold air outlets 5; the air distributing device 6 is arranged at two ends of the inner cavity of the shell 1, the air distributing device 6 is arranged between the air conditioning air inlet 4 and the air conditioning air outlet 5, a plurality of air inducing holes 7 are formed in the air distributing device 6, the air distributing device 6 is a back plate which is integrally formed with the shell 1, the air distributing device 6 comprises an air inlet air distributing cover and an air outlet air distributing cover, a plurality of air inducing holes 7 are symmetrically formed in the center of the air distributing device 6, and the distribution diameter of the air inducing holes on the air inlet air distributing cover is smaller than that of the air inducing holes on the air outlet air distributing cover;
the motor stator 2 and the main shaft 3 are arranged between the air homogenizing devices 6 at the two ends, and the two ends of the main shaft 3 penetrate through the air homogenizing devices 6.
And both ends of the spindle 3 of the centrifugal air compressor can be provided with compression devices which are communicated through an intermediate pipeline 8. The cold air inlet 4 is connected with an intermediate pipeline 8 through an air-cooled gas distributing pipe 9.
When embodied in practice
The cooling compressed gas is led out from the middle pipeline 8 and enters the cold air inlet 4 through the air-cooling gas distributing pipe 9, the cooling compressed gas enters the inner cavity of the shell 1 and then uniformly enters through the air guiding holes 7 on the air inlet air-homogenizing cover, the cooling air passes through the gap between the motor stator 2 and the shell 1 and the main shaft 3 and is uniformly discharged from the air guiding holes 7 on the air outlet air-homogenizing cover on the other side, and the discharged gas is discharged from the cold air outlet 5.
The embodiments of the present invention, it is understood that the above embodiments are exemplary and not intended to be construed as limiting, and those skilled in the art can change, modify, replace and modify the above embodiments without departing from the spirit and scope of the present invention, and the simple combination of the above embodiments is listed as the protection of the present invention.
Claims (10)
1. The air cooling structure of the two-stage centrifugal air compressor comprises a shell (1), a motor stator (2), a main shaft (3), a compression device arranged at the outer end of the main shaft (3), and the air cooling structure arranged in the shell (1), wherein the motor stator (2) and the main shaft (3) are embedded in the shell (1); it is characterized in that the preparation method is characterized in that,
the air conditioner is characterized in that a cold air inlet (4) and a cold air outlet (5) are arranged at two ends of the shell (1), air homogenizing devices (6) are arranged at two ends of an inner cavity of the shell (1), the air homogenizing devices (6) are arranged between the cold air inlet (4) and the cold air outlet (5), and a plurality of air inducing holes (7) which are communicated with the cold air inlet (4) and the cold air outlet (5) are formed in the air homogenizing devices (6);
the motor stator (2) and the main shaft (3) are arranged between the air homogenizing devices (6) at the two ends, and the two ends of the main shaft (3) penetrate through the air homogenizing devices (6).
2. The air cooling structure of the two-stage centrifugal air compressor as claimed in claim 1, wherein: both ends of the main shaft (3) of the centrifugal air compressor can be provided with compression devices which are communicated through an intermediate pipeline (8).
3. The air cooling structure of the two-stage centrifugal air compressor as claimed in claim 2, wherein: the cold air inlet (4) is connected with the middle pipeline (8) through an air-cooling air distributing pipe (9).
4. The air cooling structure of the two-stage centrifugal air compressor as claimed in claim 3, wherein: the air uniformizing device (6) comprises an air inlet air uniformizing cover and an air outlet air uniformizing cover.
5. The air cooling structure of the two-stage centrifugal air compressor as claimed in claim 4, wherein: the air inlet and outlet air homogenizing covers are both back plates integrally formed with the shell (1).
6. The air cooling structure of the two-stage centrifugal air compressor as claimed in claim 4, wherein: the air inlet and outlet air homogenizing covers are provided with a plurality of air inducing holes (7) which are centrosymmetric.
7. The air cooling structure of the two-stage centrifugal air compressor as claimed in claim 6, wherein: the distribution diameter of the air guiding holes on the air inlet air-homogenizing cover is smaller than that of the air guiding holes on the air outlet air-homogenizing cover.
8. The air cooling structure of the two-stage centrifugal air compressor as claimed in claim 7, wherein: the cooling compressed gas is led out from the middle pipeline (8) and enters the cold air inlet (4) through the air-cooling air distributing pipe (9), the cooling compressed gas enters the inner cavity of the shell (1) and then uniformly enters through the air inlet holes (7) on the air inlet air-homogenizing cover, the cooling air passes through the gap between the motor stator (2) and the shell (1) and the main shaft (3), the cooling air is uniformly discharged from the air inlet holes (7) on the air outlet air-homogenizing cover on the other side, and the discharged gas is discharged from the cold air outlet (5).
9. The air cooling structure of the two-stage centrifugal air compressor as claimed in claim 1, wherein: a one-way valve is arranged in the cold air outlet (5).
10. The air cooling structure of the two-stage centrifugal air compressor as claimed in claim 1, wherein: the number of the cold air outlets (5) is two, and the two cold air outlets (5) are in axial symmetry distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120653784.3U CN214577927U (en) | 2021-03-31 | 2021-03-31 | Air cooling structure of two-stage centrifugal air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120653784.3U CN214577927U (en) | 2021-03-31 | 2021-03-31 | Air cooling structure of two-stage centrifugal air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214577927U true CN214577927U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120653784.3U Active CN214577927U (en) | 2021-03-31 | 2021-03-31 | Air cooling structure of two-stage centrifugal air compressor |
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| CN (1) | CN214577927U (en) |
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2021
- 2021-03-31 CN CN202120653784.3U patent/CN214577927U/en active Active
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