CN216044603U - Impeller and hydrogen circulating pump - Google Patents
Impeller and hydrogen circulating pump Download PDFInfo
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- CN216044603U CN216044603U CN202122137722.XU CN202122137722U CN216044603U CN 216044603 U CN216044603 U CN 216044603U CN 202122137722 U CN202122137722 U CN 202122137722U CN 216044603 U CN216044603 U CN 216044603U
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Abstract
The utility model relates to the technical field of circulating pumps, in particular to an impeller and a hydrogen circulating pump. The utility model provides an impeller, its characterized in that includes impeller body, impeller body comprises wheel bottom, wheel cap and a plurality of blade, wheel cap department is equipped with inlet channel, be equipped with the inner chamber between wheel bottom and wheel cap, the skew middle part department of the interior terminal surface of wheel bottom is equipped with a plurality of blades, a plurality of blades are and use impeller body axis of rotation to set up as the even interval of center annular, a plurality of blades divide the outer fringe punishment of inner chamber into a plurality of outlet channel that run through impeller body circumference outer wall, two faces of blade along the wheel bottom positive and negative direction of rotation are pressure surface and suction surface respectively, the inner end of pressure surface meets and constitutes the acute angle with the suction surface, the opening orientation that the pressure surface constitutes is the same with impeller body's direction of rotation. The utility model has the advantages of reducing the flow loss of the hydrogen gas flow, realizing the function of pressurizing the hydrogen gas flow and facilitating the miniaturization of the hydrogen circulating pump.
Description
Technical Field
The utility model relates to the technical field of circulating pumps, in particular to an impeller and a hydrogen circulating pump.
Background
The hydrogen circulating pump disclosed in the chinese patent with the application number of 202110235969.7 comprises an impeller, the impeller comprises blades, a blade bearing disc and a sealing disc, the blades are uniformly arranged at one end of the blade bearing disc facing an axial air inlet around the rotation axis of the impeller, the blades are flat sheets, the tops of the blades are formed by smooth curved surface transition connection, the matching surface of the inside of a volute and the top contour line of the impeller blade is formed by three circular arcs in sequence by smooth transition connection, and a gap exists between the matching surface of the volute and the top contour line of the impeller blade. After the hydrogen circulating pump is miniaturized as required, the pressure boost function of hydrogen circulating pump will not be guaranteed to this kind of impeller, and the result of use is relatively poor, is unfavorable for the miniaturization of hydrogen circulating pump.
Disclosure of Invention
The utility model aims to provide an impeller which can improve the supercharging capacity of a hydrogen circulating pump and can make the hydrogen circulating pump more compact.
In order to achieve the purpose, the utility model adopts the following technical scheme: an impeller comprises an impeller body, wherein the impeller body is composed of an impeller bottom, an impeller cover and a plurality of blades, an air inlet channel is arranged at the impeller cover, the air inlet channel is coaxially arranged with a rotation axis of the impeller body and penetrates through the end face of the impeller cover, an inner cavity is arranged between the impeller bottom and the impeller cover and is communicated with the air inlet channel, the middle part of the impeller bottom is used for receiving torque to enable the impeller bottom to rotate, the plurality of blades are arranged at the position, deviated from the middle part, of the inner end face of the impeller bottom, the plurality of blades are annularly and uniformly arranged on the impeller bottom at intervals by taking the rotation axis of the impeller body as the center, the outer edge of the inner cavity is divided into a plurality of air outlet channels penetrating through the circumferential outer wall of the impeller body by the plurality of blades, one air outlet channel is formed between every two adjacent blades, and the two surfaces of the blades in the rotation direction of the impeller bottom are curved surfaces forming included angles and are respectively a pressure surface and a suction surface, the inner end of the pressure surface is connected with the inner end of the suction surface to form an acute angle, and the direction of an opening formed by the pressure surface is the same as the rotating direction of the impeller body.
The blades of the utility model are in a strong forward bending shape, which is convenient for applying work to hydrogen, can greatly improve the flow velocity of the hydrogen in the gas outlet channel, keep the flow loss level of the hydrogen at a low level, ensure that the pressure of the hydrogen in the gas outlet channel is high under the condition that the flow entering the gas inlet channel is small, can be used in a small-sized hydrogen circulating pump, and is convenient for realizing the miniaturization of the hydrogen circulating pump. Wherein, can be according to actual need, do certain little fillet with the blade inner. The end face of the wheel bottom, which is exposed outside, is an outer end face, the inner end face of the wheel bottom is a plane, on which the inner cavity is located, along the axial direction of the impeller, and the inner end face is also an end face, close to the wheel cover, of the wheel bottom.
Preferably, the angle value of the blade bend angle formed by the blades is alpha, and the angle is more than or equal to 80 degrees and less than or equal to 130 degrees. The large bending angle is favorable for improving the working capacity of the impeller, can improve the pressure rise of hydrogen and inhibit the separation between hydrogen airflow and the suction surface of the blade.
Preferably, the pressure surface and the suction surface are both vertical to the inner end surface of the wheel bottom; the outer end of the pressure surface and the outer end of the suction surface are separated and are connected with the circumferential edge of the wheel bottom. The pressure surface and the suction surface are both vertical to the inner end surface of the wheel bottom, namely the cross sections of the blades at all positions along the axial direction of the impeller are the same in shape and size, and the pressure surface and the suction surface of the blades are not deformed in the axial direction, so that the impeller is a two-dimensional impeller, the processing and manufacturing difficulty and the production period are greatly reduced, the manufacturing cost is reduced, and the large-scale production is adapted. The design of the outer end of the pressure surface and the outer end of the suction surface can ensure that the pressure of the pumped hydrogen is larger.
Preferably, the outer end of the air outlet channel is in a sharply enlarged flaring structure. The gas outlet channel is subjected to larger width change within a smaller distance, so that the moving track of the hydrogen gas led out from the gas outlet channel is more deviated to the outlet direction of the volute provided with the impeller, the compressed gas can form a tangential trend, and the gas outlet compression efficiency can be improved. Meanwhile, the width of the outer end of the blade can be reduced.
Preferably, a curved transition section is formed at the position of the air inlet channel, which is close to the blade; the blades are relatively positioned on the circumferential outer side of the air inlet channel, or the inner ends of the blades are close to the inner wall of the air inlet channel. The inner diameter of the air outlet end of the air inlet channel is gradually increased so that the air flow in the middle can be guided to the periphery, and the air flow can uniformly enter each air outlet channel. Meanwhile, the blades are relatively positioned on the circumferential outer side of the air inlet channel, or the inner ends of the blades are close to the inner wall of the air inlet channel, so that air can enter the inner cavity from the air inlet channel conveniently. The impeller body is a closed impeller, so that the impeller is convenient to process and manufacture and has lower cost; the impeller can be integrally formed by adopting modes such as 3D printing and the like, and the wheel cover and the wheel bottom can also be manufactured respectively and then connected and fixed together; the wheel cover and the wheel bottom can be fixed in various modes such as welding (spin welding) or riveting.
Preferably, the middle part of the wheel bottom is provided with an annular bulge extending towards the wheel cover side, and the outer wall of the annular bulge and the inner end face of the wheel bottom are in smooth transition. The circumferential outer wall of the annular protrusion can guide the gas, so that the gas flow can enter each gas outlet channel more smoothly.
The utility model also discloses a hydrogen circulating pump with the impeller, which comprises a volute, wherein the volute is provided with an axial air inlet channel arranged at the center of the volute and a tangential air outlet channel arranged in the circumferential direction of the volute, the volute is also provided with an impeller placing cavity used for accommodating the impeller body, and a sudden expansion structure with the cross section area of the tangential air outlet channel larger than that of the air outlet channel is formed at the joint of the tangential air outlet channel of the volute and the air outlet channel of the impeller.
The width of the inner end (air inlet) of the tangential exhaust channel is suddenly enlarged compared with the width of the outer end (air outlet) of the air outlet channel, namely, the width of the inner end of the tangential exhaust channel is suddenly maximum relative to the width of the outer end of the air outlet channel, and the width of the area through which the hydrogen gas flows is not gradually increased. Because the impeller body adopts the design, the airflow at the air inlet of the volute is highly tangential, namely the radial velocity component of the hydrogen airflow is far smaller than the tangential component, so the sudden expansion design can induce a pair of angular vortexes along the flow direction rather than a pair of stall groups separated along the radial large range, thereby controlling the flow loss and realizing rapid diffusion by a compact structure.
Preferably, the inner edge of the cross section of the tangential exhaust channel is square. The tangential exhaust channel is arranged in a square shape, so that the processing of the volute is facilitated, the smooth finish of the inner surface of the volute is facilitated, and the reduction of the friction loss of the hydrogen fluid is facilitated.
Preferably, a first arc-shaped guide surface is formed between the side wall and the bottom surface of the tangential exhaust channel, a second arc-shaped guide surface is formed between the side wall and the bottom surface of the impeller placing cavity, and the first arc-shaped guide surface and the second arc-shaped guide surface naturally extend and intersect to form a lower forward-swept structure at the front end of the volute tongue; and/or a third arc-shaped guide surface is formed between the side wall and the top surface of the tangential exhaust channel, a fourth arc-shaped guide surface is formed between the side wall and the top surface of the impeller placing cavity, and the third arc-shaped guide surface and the fourth arc-shaped guide surface naturally extend and intersect to form a forward-swept structure at the front end of the volute tongue.
The forward swept structure is formed at the volute tongue of the volute, so that the hydrogen airflow flowing along the tangential direction can be guided, sudden expansion and separation of the hydrogen airflow can be inhibited, the pressurization function of the hydrogen circulating pump is ensured, angular vortex caused by the sudden expansion design can be inhibited, and the flow loss of the hydrogen airflow can be further reduced.
Preferably, a labyrinth structure for sealing is formed on the top surface of the impeller placing cavity or the bottom surface of the impeller placing cavity. When the utility model is used, a non-contact dynamic seal is formed between the grate structures to prevent hydrogen gas flow from flowing out from a gap between the impeller and the volute. The grate structure can also play a role in reducing the axial force of the impeller, so that the thrust disc of the magnetic suspension motor can be smaller under the condition that the hydrogen circulating pump adopts the magnetic suspension motor to provide power, and the energy consumption is reduced.
The utility model has the advantages of reducing the flow loss of the hydrogen gas flow, realizing the function of pressurizing the hydrogen gas flow by the hydrogen circulating pump and facilitating the miniaturization of the hydrogen circulating pump.
Drawings
Fig. 1 is a cross-sectional view of an impeller body of embodiment 1;
fig. 2 is another sectional view of the impeller body of embodiment 1;
FIG. 3 is a schematic view of the structure of FIG. 2 from another perspective;
FIG. 4 is a sectional view of the volute of embodiment 2;
fig. 5 is another sectional view of the scroll casing of embodiment 2;
FIG. 6 is a schematic view of a structure at the labyrinth structure of FIG. 4;
figure 7 is a cross-sectional view of the first volute of the volute of embodiment 2 when mated with the impeller body;
fig. 8 is a schematic view of a structure of a first volute of the volute of embodiment 2;
FIG. 9 is a schematic view of a structure at the lower forward swept configuration of FIG. 8;
Detailed Description
The utility model is further described below with reference to the figures and specific embodiments.
Example 1
As shown in fig. 1 to 3, the impeller of the present invention includes an impeller body 100, the impeller body 100 is composed of a wheel bottom 1, a wheel cover 2 and a plurality of blades 3, an inner cavity 10 is disposed between the wheel bottom 1 and the wheel cover 2, and the blades 3 are disposed in the inner cavity 10. Wherein, the shape of the outer edge of the section of the wheel bottom 1 and the shape of the outer edge of the section of the wheel cover 2 are both circular.
As shown in fig. 1, an air inlet channel 21 is disposed in the middle of the shroud 2 and is coaxial with the rotation axis of the impeller body 100, one end of the air inlet channel 21 penetrates through the end face of the shroud 2, the other end of the air inlet channel 21 is communicated with the inner cavity 10, and a curved transition section 22 is formed at a position of the air inlet channel 21 adjacent to the blades.
As shown in fig. 1 to 3, the middle of the wheel bottom 1 is used for receiving torque to drive the impeller body 100 to rotate, the middle of the wheel bottom 1 is provided with a fixing hole 11 for matching with an output shaft (not shown) of a driving motor, the blades 3 are integrally formed at the inner end face of the wheel bottom 1 (the end face of the wheel bottom close to the wheel cover 2), the blades 3 are all deviated from the fixing hole 11, the blades 3 are uniformly arranged on the wheel bottom 1 at intervals in an annular shape with the rotation axis (output shaft axis) of the impeller body 100 as the center, the blades 3 divide the outer edge of the inner cavity 10 into a plurality of air outlet channels 31 penetrating through the circumferential outer wall of the impeller body 100, and an air outlet channel 31 is formed between every two adjacent blades 3.
Wherein, the middle part of the wheel bottom 1 is provided with an annular bulge 12 extending towards the wheel cover 2 side, the outer diameter of the annular bulge 12 is gradually increased from the wheel cover 2 to the wheel bottom 1, the outer wall of the annular bulge 12 and the inner end face of the wheel bottom 1 are in smooth transition, and the inner hole of the annular bulge 12 is the fixing hole 11. Wherein, the outer end of the air outlet channel 31 is in a flaring structure which is sharply enlarged.
Two surfaces of the blade 3 in the forward and reverse rotation directions of the wheel bottom 1 are curved surfaces forming an included angle and are respectively a pressure surface 301 and a suction surface 302, the inner end of the pressure surface 301 is connected with the inner end of the suction surface 302 to form an acute angle 303, the outer end of the pressure surface 301 and the outer end of the suction surface 302 are separated and are connected with the circumferential edge of the wheel bottom 1, the opening formed by the pressure surface 301 faces the same rotation direction of the impeller body 100 (the impeller bottom rotates along the counterclockwise direction shown in fig. 2), and the pressure surface 301 and the suction surface 302 are both arranged perpendicular to the inner end surface of the wheel bottom.
Wherein the angle value of the blade bend angle formed by the blades 3 is alpha, and the alpha is more than or equal to 80 degrees and less than or equal to 130 degrees. The pressure surface 301 of the blade 3 is open in a direction tangential to the circumferential outer edge of the disk-shaped wheel base 1. Wherein the blade 3 is hollow to have a weight-reducing cavity 30. The curved surface shape of the suction surface 302 is different from the curved surface shape of the pressure surface 301. Wherein the vanes 3 are located relatively outside the intake passage 11 in the circumferential direction.
Example 2
As shown in fig. 4, 5 and 6, the present embodiment discloses a hydrogen circulation pump with the above-mentioned impeller, which includes a volute 4, the volute 4 has an axial air inlet channel 41 arranged at its center position and a tangential air outlet channel 42 arranged at its circumferential direction, the volute 4 further has an impeller placing cavity 40 for accommodating the impeller body 100, the inner edge of the cross section of the inner end of the tangential air outlet channel 42 is square, and a sudden expansion structure that the cross section area of the tangential air outlet channel 42 is larger than that of the air outlet channel 31 is formed at the joint of the tangential air outlet channel 42 of the volute 4 and the air outlet channel 31 of the impeller.
As shown in fig. 4 to 9, a first arc-shaped guide surface 61 is formed between the side wall and the bottom surface of the tangential exhaust channel 42, a second arc-shaped guide surface 62 is formed between the side wall and the bottom surface of the impeller placing cavity 40, and the first arc-shaped guide surface 61 and the second arc-shaped guide surface 62 naturally extend and intersect to form a lower swept-forward structure 49 at the front end of the volute tongue. Meanwhile, a third arc-shaped guide surface 63 is formed between the side wall and the top surface of the tangential exhaust channel 42, a fourth arc-shaped guide surface is formed between the side wall and the top surface of the impeller placing cavity 40, the third arc-shaped guide surface 63 and the fourth arc-shaped guide surface naturally extend and intersect to form an upper forward-swept structure at the front end of the volute tongue, and the lower forward-swept structure 49 and the upper forward-swept structure are symmetrically arranged up and down.
The first arc-shaped guide surface 61 extends towards the impeller placing cavity 40 along the extending direction of the tangential exhaust channel 42, the first arc-shaped guide surface 61 is of an arc-shaped structure with an opening facing the inner side of the tangential exhaust channel 42, and the height of the first arc-shaped guide surface 61 is gradually reduced from the tangential exhaust channel 42 to the impeller placing cavity 40. The second arc-shaped guide surface 62 extends towards the impeller placing cavity 40 side along the direction opposite to the extension direction of the tangential exhaust channel 42, the second arc-shaped guide surface 62 is of an arc-shaped structure with an opening facing the inner side of the impeller placing cavity, and the height of the second arc-shaped guide surface 62 is gradually reduced from the tangential exhaust channel 42 to the impeller placing cavity side 40.
As shown in fig. 4, 5, 7 and 9, the volute 4 of the present embodiment is formed by splicing a first volute 401 and a second volute 402, the inner walls of the first volute 401 and the second volute 402 respectively form a top surface of an impeller placing cavity and a bottom surface of the impeller placing cavity, and the top surface and the bottom surface of the impeller placing cavity are both formed with a labyrinth structure 44 for sealing.
The utility model has the advantages of reducing the flow loss of the hydrogen gas flow, realizing the function of pressurizing the hydrogen gas flow by the hydrogen circulating pump and facilitating the miniaturization of the hydrogen circulating pump.
Claims (10)
1. An impeller is characterized by comprising an impeller body, wherein the impeller body comprises an impeller bottom, an impeller cover and a plurality of blades, an air inlet channel is arranged at the impeller cover, the air inlet channel is coaxially arranged with a rotation axis of the impeller body and penetrates through the end surface of the impeller cover, an inner cavity is arranged between the impeller bottom and the impeller cover and is communicated with the air inlet channel, the middle part of the impeller bottom is used for receiving torque to enable the impeller bottom to rotate, the plurality of blades are arranged at the position, deviated from the middle part, of the inner end surface of the impeller bottom, are arranged on the impeller bottom in an annular shape with the rotation axis of the impeller body as the center and are uniformly spaced, the outer edge of the inner cavity is divided into a plurality of air outlet channels penetrating through the circumferential outer wall of the impeller body by the plurality of blades, one air outlet channel is formed between every two adjacent blades, and the two surfaces of the blades in the positive and negative rotation directions of the impeller bottom are curved surfaces forming included angles and are respectively a pressure surface and a suction surface, the inner end of the pressure surface is connected with the inner end of the suction surface to form an acute angle, and the direction of an opening formed by the pressure surface is the same as the rotating direction of the impeller body.
2. An impeller according to claim 1, characterized in that the blades form a blade angle with an angle value α of 80 ° α or more and 130 ° or less.
3. An impeller according to claim 1, wherein the pressure and suction surfaces are perpendicular to the inner end surface of the wheel base; the outer end of the pressure surface and the outer end of the suction surface are separated and are connected with the circumferential edge of the wheel bottom.
4. An impeller according to claim 1, wherein the outer end of the outlet channel is in a sharply enlarged flaring configuration.
5. An impeller according to claim 1, wherein said inlet passage is formed with a curved transition section adjacent said vanes; the blades are relatively positioned on the circumferential outer side of the air inlet channel, or the inner ends of the blades are close to the inner wall of the air inlet channel.
6. The impeller as claimed in claim 1, wherein the wheel base middle part is provided with an annular projection extending towards the wheel cover side, and the outer wall of the annular projection and the inner end face of the wheel base are in smooth transition.
7. A hydrogen circulating pump with the impeller of any one of the preceding claims 1-6, characterized by comprising a volute, wherein the volute has an axial inlet channel arranged at the center of the volute and a tangential outlet channel arranged at the periphery of the volute, the volute also has an impeller placing cavity for accommodating the impeller body, and the joint of the tangential outlet channel of the volute and the outlet channel of the impeller is formed with a sudden expansion structure with the cross-sectional area of the tangential outlet channel larger than that of the outlet channel.
8. The hydrogen circulation pump according to claim 7, wherein the tangential exhaust gas passage has a cross-sectional inner edge having a square shape.
9. The hydrogen circulation pump according to claim 7 or 8, wherein a first arc-shaped guide surface is formed between the side wall and the bottom surface of the tangential exhaust channel, a second arc-shaped guide surface is formed between the side wall and the bottom surface of the impeller accommodating cavity, and the first arc-shaped guide surface and the second arc-shaped guide surface naturally extend and intersect to form a lower forward-swept structure at the front end of the volute tongue; and/or a third arc-shaped guide surface is formed between the side wall and the top surface of the tangential exhaust channel, a fourth arc-shaped guide surface is formed between the side wall and the top surface of the impeller placing cavity, and the third arc-shaped guide surface and the fourth arc-shaped guide surface naturally extend and intersect to form a forward-swept structure at the front end of the volute tongue.
10. The hydrogen circulation pump according to claim 7 or 8, wherein a labyrinth structure for sealing is formed on the top surface of the impeller housing chamber or the bottom surface of the impeller housing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122137722.XU CN216044603U (en) | 2021-09-06 | 2021-09-06 | Impeller and hydrogen circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122137722.XU CN216044603U (en) | 2021-09-06 | 2021-09-06 | Impeller and hydrogen circulating pump |
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| Publication Number | Publication Date |
|---|---|
| CN216044603U true CN216044603U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122137722.XU Active CN216044603U (en) | 2021-09-06 | 2021-09-06 | Impeller and hydrogen circulating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216044603U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114824363A (en) * | 2022-04-27 | 2022-07-29 | 北京昆腾迈格技术有限公司 | Hydrogen circulating pump integrated with ejector |
| CN114824363B (en) * | 2022-04-27 | 2024-04-30 | 杭州氢磁机电科技有限公司 | Hydrogen circulating pump integrated with ejector |
-
2021
- 2021-09-06 CN CN202122137722.XU patent/CN216044603U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114824363A (en) * | 2022-04-27 | 2022-07-29 | 北京昆腾迈格技术有限公司 | Hydrogen circulating pump integrated with ejector |
| CN114824363B (en) * | 2022-04-27 | 2024-04-30 | 杭州氢磁机电科技有限公司 | Hydrogen circulating pump integrated with ejector |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220810 Address after: 1st Floor, Building 8, No. 161, No. 17 Street, Baiyang Street, Qiantang District, Hangzhou City, Zhejiang Province, 310018 Patentee after: Hangzhou Hydrogen Magnetic Electromechanical Technology Co., Ltd. Address before: No. 410, 4th floor, shining building, No. 35 Xueyuan Road, Haidian District, Beijing 100083 Patentee before: Beijing Kuntengmig Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |