CN211599084U - Impeller applied to high-pressure water pump of fuel cell system - Google Patents
Impeller applied to high-pressure water pump of fuel cell system Download PDFInfo
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- CN211599084U CN211599084U CN201921920513.9U CN201921920513U CN211599084U CN 211599084 U CN211599084 U CN 211599084U CN 201921920513 U CN201921920513 U CN 201921920513U CN 211599084 U CN211599084 U CN 211599084U
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- fuel cell
- impeller
- water pump
- cell system
- pressure water
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Abstract
The utility model discloses an impeller applied to a high-pressure water pump of a fuel cell system, which comprises a turntable and a plurality of blades arranged on the turntable in a circumferential array manner; the turntable is provided with a wading surface in the center; the blade is arc-shaped, and is provided with a front edge close to the wading surface and a tail edge close to the outer edge of the rotary table, a pressure surface facing to water flow when the impeller rotates, a suction surface for sucking the water flow, a blade root combined with the rotary table and a blade top; the wading surface is higher than the lowest end of the leading edge. The utility model discloses based on high-power fuel cell cooling system's performance demand, through CFD emulation calculation, optimize the impeller structure, effectively strengthened improvement water pump anti cavitation erosion performance and hydraulic efficiency, satisfy the requirement of high-power fuel cell cooling system flow and lift.
Description
Technical Field
The utility model relates to a fuel cell power system belongs to fuel cell automobile engine cooling system's research field, in particular to be applied to fuel cell system high pressure water pump's impeller.
Background
Under the current trend of energy conservation and emission reduction, a fuel cell automobile is one of international research hotspots in recent years as a solution for a new energy automobile. However, before the fuel cell automobile is industrialized worldwide, there are many problems to be solved, and the hydrothermal management system of the fuel cell is one of the more critical problems. The water pump is used as a key part in the fuel cell water heat management system and provides cooling water with certain flow, lift and pressure corresponding to the heat dissipation requirement of the system for the fuel cell cooling system.
At present, for a 30kW fuel cell system, a low-pressure (12V or 24V) water pump can meet the working condition requirements of 80L/min of flow and 8m of lift. However, for a 60kW fuel cell system, even a fuel cell system with higher output power, the flow rate of the cooling liquid needs to be not less than 155L/min, the lift is not less than 15m, and the low-pressure water pump cannot meet the requirements of the flow rate, the lift and the pressure of the cooling liquid of the fuel cell cooling system, so that it is necessary to develop a high-pressure water pump for a high-power fuel cell system. The impeller is a part of the water pump which directly applies work to liquid, centrifugal force generated by high-speed rotation of the impeller is main power for conveying cooling liquid, and the quality of the structural design of the impeller directly determines the performance of the water pump.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a be applied to fuel cell system high pressure water pump's impeller, simple structure, in the aspect of the processing for high pressure water pump sends the liquid flow big, and the lift is high, and anti cavitation erosion nature is strong, and work efficiency is high.
The above technical purpose of the present invention can be achieved by the following technical solutions:
an impeller for a high pressure water pump of a fuel cell system comprises a rotary plate, a plurality of blades circumferentially arrayed on the rotary plate; the turntable is provided with a wading surface in the center; the blade is arc-shaped, and is provided with a front edge close to the wading surface and a tail edge close to the outer edge of the rotary table, a pressure surface facing to water flow when the impeller rotates, a suction surface for sucking the water flow, a blade root combined with the rotary table and a blade top; the wading surface is higher than the lowest end of the leading edge.
When the high-pressure water pump impeller rotates, cooling liquid enters from the wading surface, the flow direction of the cooling liquid is changed from the axial direction to the radial direction through the front edge, the pressure surface is extruded by the liquid, the suction surface is arranged on the back surface of the pressure surface, the pressure applied to the suction surface is smaller relative to the pressure surface, negative pressure suction force is generated, and the cooling liquid is continuously sucked; the wading surface is higher than the lowest end of the front edge of the blade, so that the water inlet end surface of the impeller is increased, the flow of cooling liquid is increased, and the integral cavitation erosion resistance is improved.
Preferably, the leading edge is inclined downwardly towards the wade surface, and the leading edge is inclined progressively towards the pressure surface from the root to the tip.
Therefore, the influence of the turning centrifugal force of the water flow is weakened, the speed and the pressure of the water flow can be uniformly distributed on the whole impeller from the blade root to the blade top, and the cavitation resistance of the water flow inlet is improved.
Preferably, the leading edge is pointed and flat, the trailing edge is blunt, and the thickness of the leading edge gradually increases from the trailing edge.
Preferably, the blade root and the blade top are integrally inclined downwards by 10 degrees along the normal direction of the arc curvature of the impeller. The liquid conveying capacity is enhanced, the lift is improved, the pressure balance of each position during liquid conveying is improved, and the turbulence is reduced.
Preferably, the distance from the end face of the front edge to the center of the impeller is 1/3 of the radius of the wheel disc; the tail edge and the outer edge of the rotary disc form an included angle of 30 degrees.
Preferably, the wading surface is provided with a central hole in the center, and each blade is uniformly surrounded on the periphery of the central hole. The connection of the turntable and the transmission shaft is convenient.
Preferably, the impeller is a plastic part. The impeller requires the characteristic that the electrical conductivity is less than 5us/cm for the cleanliness of cooling liquid.
Preferably, the number of the blades is 7.
To sum up, the utility model discloses following beneficial effect has:
the impeller structure is optimized through CFD simulation calculation based on the performance requirement of a high-power fuel cell cooling system, the cavitation erosion resistance and the hydraulic efficiency of the water pump are effectively improved, and the requirements of the flow and the lift of the high-power fuel cell cooling system are met.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the embodiment of FIG. 1 from another angle;
fig. 3 is a cross-sectional view of the embodiment of fig. 1 at another angle.
In the figure: 1 is a wheel disc; 2 is a blade; 3 is wading surface; 4 is the leading edge; 5 is a trailing edge; 6 is a suction surface; 7 is a pressure surface; 8 is the blade root; 9 is the leaf top.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and preferred embodiments.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Example (b): as shown in fig. 1 to 3, an impeller for a high pressure water pump of a fuel cell system includes a rotary plate 1, a plurality of blades 2 circumferentially arrayed on the rotary plate; the turntable has a wading surface 3 in the center; the blade is arc-shaped and is provided with a front edge 4 close to the wading surface, a tail edge 5 close to the outer edge of the rotary table, a pressure surface 7 facing to water flow when the impeller rotates, a suction surface 6 for sucking the water flow, a blade root 8 combined with the rotary table and a blade top 9; the wading surface is higher than the lowest end of the front edge.
The leading edge is inclined downwardly towards the wading surface and the leading edge is inclined progressively towards the pressure surface from the root to the tip. The front edge is in a sharp-pointed flat shape, the tail edge is in a blunt shape, and the thickness from the front edge to the tail edge is gradually increased.
The root to the top of the blade are integrally inclined downwards by 10 degrees along the normal direction of the arc curvature of the impeller. The distance from the end face of the front edge to the center of the impeller is 1/3 of the radius of the wheel disc; the trailing edge makes an angle of 30 degrees with the outer edge of the turntable.
The center of the wading surface is provided with a central hole, and each blade uniformly surrounds the central hole. The impeller is a plastic piece. The number of blades is 7.
Claims (8)
1. An impeller applied to a high-pressure water pump of a fuel cell system is characterized in that: comprising a rotating disc (1), a plurality of blades (2) circumferentially arrayed on the rotating disc; the turntable has a centrally located wading surface (3); the blade is arc-shaped and is provided with a front edge (4) close to the wading surface, a tail edge (5) close to the outer edge of the rotary disc, a pressure surface (7) facing to water flow when the impeller rotates, a suction surface (6) for sucking water flow, a blade root (8) combined with the rotary disc and a blade top (9); the wading surface is higher than the lowest end of the leading edge.
2. The impeller applied to the high pressure water pump of the fuel cell system according to claim 1, wherein: the leading edge is inclined downwards towards the wading surface, and the leading edge is gradually inclined towards the pressure surface from the blade root to the blade top.
3. The impeller applied to the high pressure water pump of the fuel cell system according to claim 1, wherein: the leading edge is of a pointed flat shape, the trailing edge is of a blunt end, and the thickness of the leading edge gradually increases from the trailing edge.
4. The impeller applied to the high pressure water pump of the fuel cell system according to claim 1, wherein: the blade root to the blade top are integrally inclined downwards by 10 degrees along the normal direction of the arc curvature of the impeller.
5. The impeller applied to the high pressure water pump of the fuel cell system according to claim 1, wherein: the distance from the end face of the front edge to the center of the impeller is 1/3 of the radius of the wheel disc; the tail edge and the outer edge of the rotary disc form an included angle of 30 degrees.
6. The impeller applied to the high pressure water pump of the fuel cell system according to claim 1, wherein: the center of the wading surface is provided with a center hole, and each blade is uniformly surrounded around the center hole.
7. The impeller applied to the high pressure water pump of the fuel cell system according to claim 1, wherein: the impeller is a plastic piece.
8. The impeller applied to the high pressure water pump of the fuel cell system according to claim 1, wherein: the number of the blades is 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921920513.9U CN211599084U (en) | 2019-11-08 | 2019-11-08 | Impeller applied to high-pressure water pump of fuel cell system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921920513.9U CN211599084U (en) | 2019-11-08 | 2019-11-08 | Impeller applied to high-pressure water pump of fuel cell system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211599084U true CN211599084U (en) | 2020-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921920513.9U Active CN211599084U (en) | 2019-11-08 | 2019-11-08 | Impeller applied to high-pressure water pump of fuel cell system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211599084U (en) |
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2019
- 2019-11-08 CN CN201921920513.9U patent/CN211599084U/en active Active
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