CN217462525U - Hydrogen circulation pump, hydrogen fuel power system and hydrogen fuel vehicle - Google Patents

Abstract

The utility model discloses a hydrogen circulating pump, hydrogen fuel driving system and hydrogen fuel car, wherein, the hydrogen circulating pump includes the casing, the apparatus further comprises a rotating shaft, whirlpool disk structure and impeller, the casing is equipped with the installation cavity, the upper portion of installation cavity is equipped with the air inlet, the rotating shaft is installed in the installation cavity along the rotation of up-down direction axis, whirlpool disk structure includes the quiet whirlpool disk and the movable whirlpool disk that locate in the installation cavity, movable whirlpool disk locates the lower extreme of rotating shaft, in order to do eccentric rotation under the drive of rotating shaft, quiet whirlpool disk is located the below of movable whirlpool disk, in order to form the compression chamber with movable whirlpool disk cooperation, the end plate of quiet whirlpool disk is equipped with the gas vent that is linked together with the compression chamber, the impeller cover is located the periphery side of rotating shaft and is located the top of movable whirlpool disk, the impeller rotates under the drive of rotating shaft, in order to guide the gas in installation cavity middle part to the periphery side of installation cavity, so through the impeller, make the gas of gas department can continuous inflow, thereby contributing to an increase in the suction amount of the hydrogen circulation pump.

Description

Hydrogen circulating pump, hydrogen fuel power system and hydrogen fuel vehicle

technical field

The utility model relates to the technical field of compressors, in particular to a hydrogen circulating pump, a hydrogen fuel power system and a hydrogen fuel vehicle.

Background technique

At present, the power research of hydrogen fuel vehicles mainly focuses on new power devices such as hydrogen fuel internal combustion engine and hydrogen fuel cell. During the working process of the existing scroll hydrogen circulating pump, the gas at the inlet of the compression chamber has the problem of over-compression, so that the gas pressure at the inlet of the compression chamber is higher than the pressure at the inlet of the compressor, resulting in insufficient suction capacity of the compression chamber. Inhalation is less efficient.

Utility model content

The main purpose of the utility model is to propose a hydrogen circulation pump, a hydrogen fuel power system and a hydrogen fuel vehicle, which aims to solve the problem that the gas pressure at the inlet of the compression chamber is higher than the pressure at the compressor inlet and improve the hydrogen circulation efficiency of the fuel cell stack .

In order to achieve the above-mentioned purpose, the utility model proposes a kind, including:

the shell is provided with an installation cavity, and the upper part of the installation cavity is provided with an air inlet;

The rotating shaft is rotated and installed in the installation cavity along the up-down axis;

The scroll structure includes a stationary scroll and a movable scroll arranged in the installation cavity. The movable scroll is arranged at the lower end of the rotating shaft to rotate eccentrically under the driving of the rotating shaft. a disk is located below the movable scroll to form a compression chamber in cooperation with the movable scroll, and an exhaust port communicated with the compression chamber is provided on the end plate of the stationary scroll; and,

The impeller is sleeved on the outer peripheral side of the rotating shaft and is located above the movable scroll. The impeller rotates under the driving of the rotating shaft to guide the gas in the middle of the installation cavity to the installation cavity perimeter side.

Optionally, the hydrogen circulation pump further includes a guide vane arranged on the side wall of the installation cavity, and the guide vane is located between the movable scroll and the impeller.

Optionally, the hydrogen circulation pump further includes a baffle plate arranged between the guide vane and the movable scroll, the baffle is in sealing contact with the movable scroll, and the baffle plate is provided with a baffle plate. There is a pressure relief groove;

Correspondingly, the end plate of the movable scroll is provided with two pressure relief holes adapted to the pressure relief grooves.

Optionally, the guide vanes are detachably installed on the side wall of the installation cavity.

Optionally, both the stationary scroll and the movable scroll include an end plate and a scroll ring arranged on the end plate;

The end plate is provided with a cooling cavity, and the cooling cavity is filled with cooling oil;

The hydrogen circulation pump further includes a cooling pipe arranged in the cooling cavity, one end of the cooling pipe is arranged in the middle of the end plate, and the other end is arranged at the side of the end plate.

Optionally, the scroll ring is provided with a cooling groove communicated with the cooling cavity, and the cooling groove extends along the extending direction of the scroll ring.

Optionally, the cooling pipe includes an outer pipe and an inner pipe arranged in the outer pipe, and the outer pipe and the inner pipe form two independent cooling channels;

The liquid flow directions in the two cooling channels are opposite.

Optionally, the cooling pipes are arranged in a vortex.

The utility model also provides a hydrogen fuel power system, the hydrogen fuel power system includes the above-mentioned hydrogen circulation pump.

In addition, the present invention also provides a hydrogen fuel vehicle, wherein the hydrogen fuel vehicle includes the above-mentioned hydrogen fuel power system.

In the technical solution of the present invention, the position of the center of rotation of the movable scroll is different from that of the rotating shaft. When the rotating shaft rotates as a fixed axis, the movable scroll is driven to revolve and translate, so that the inflowing The gas in the compression chamber flows from the peripheral side of the movable scroll to the center of the movable scroll, and the gas is gradually compressed during the flow process, so that the pressure of the gas increases, and the compressed gas passes through the exhaust port At the same time, it passes through the impeller set on the rotating shaft to rotate under the driving of the rotating shaft, so that the gas gathers to the edge of the impeller under the action of centrifugal force, so that the peripheral side of the impeller forms a local high pressure area, The formation of a local low-pressure area near the center of the impeller not only helps to increase the gas pressure on the peripheral side of the movable scroll, so that the gas can flow into the compression chamber smoothly, but also reduces the gas pressure at the center of the impeller , so that the gas at the air inlet can flow toward the low pressure area at the center of the impeller, so that the gas at the air inlet can flow continuously through the impeller, thereby helping to increase the hydrogen The suction volume of the circulating pump.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained based on the structures shown in these drawings without any creative effort.

1 is a cross-sectional structural schematic diagram of an embodiment of a hydrogen circulation pump provided by the present invention;

Fig. 2 is the partial three-dimensional structure schematic diagram of the hydrogen circulation pump in Fig. 1;

Fig. 3 is the three-dimensional structure schematic diagram of the scroll structure in Fig. 1;

4 is a cross-sectional structural schematic diagram of the scroll structure in FIG. 1;

FIG. 5 is a schematic three-dimensional structural diagram of the cooling pipe in FIG. 1 .

Description of reference numbers:

label name label name 100 Hydrogen Circulation Pump 33 compression chamber 1 case 34 end plate 11 mounting cavity 341 cooling chamber 12 air intake 35 vortex 13 exhaust vent 351 cooling tank 2 shaft 36 cooling pipe 3 scroll structure 4 impeller 31 static scroll 5 Diversion Ye Shan 32 moving scroll 6 baffle

The realization, functional characteristics and advantages of the purpose of the present utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that if there is a directional indication involved in the embodiments of the present invention, the directional indication is only used to explain the relative positional relationship, motion, etc. between the components under a certain posture. If the specific posture changes , the directional indication changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for the purpose of description, and should not be construed as instructions or Implicit their relative importance or implicitly indicate the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present utility model.

At present, the power research of hydrogen fuel vehicles mainly focuses on new power devices such as hydrogen fuel internal combustion engine and hydrogen fuel cell. During the working process of the existing scroll hydrogen circulating pump, the gas at the inlet of the compression chamber has the problem of over-compression, so that the gas pressure at the inlet of the compression chamber is higher than the pressure at the inlet of the compressor, resulting in insufficient suction capacity of the compression chamber. Inhalation is less efficient.

In view of this, the present invention provides a hydrogen circulation pump, which aims to solve the problem that the gas pressure at the inlet of the compression chamber is higher than the pressure at the inlet of the compressor. 1 to 5 are schematic structural diagrams of an embodiment of the hydrogen circulation pump provided by the present invention.

Referring to FIGS. 1 to 4 , the hydrogen circulation pump 100 is characterized in that it includes a casing 1 , a rotating shaft 2 , a scroll structure 3 and an impeller 4 , the casing 1 is provided with an installation cavity 11 , and the installation cavity The upper part of 11 is provided with an air inlet 12, the rotating shaft 2 is rotatably installed in the installation cavity 11 along the up-down axis, and the scroll structure 3 includes a static scroll 31 and a movable scroll arranged in the installation cavity 11. The scroll 32, the movable scroll 32 is arranged at the lower end of the rotating shaft 2 to rotate eccentrically under the driving of the rotating shaft 2, and the stationary scroll 31 is located below the movable scroll 32 to be connected with the rotating scroll 32. The movable scroll 32 cooperates to form a compression chamber 33 , the end plate 34 of the stationary scroll 31 is provided with an exhaust port 13 that communicates with the compression chamber 33 , and the impeller 4 is sleeved on the shaft 2 . The outer peripheral side is located above the movable scroll 32 . The impeller 4 is rotated under the driving of the rotating shaft 2 to guide the gas in the middle of the installation cavity 11 to the peripheral side of the installation cavity 11 .

In the technical solution of the present invention, the position of the center of rotation of the movable scroll 32 is different from the position of the center of rotation of the rotating shaft 2. When the rotating shaft 2 rotates as a fixed axis, the movable scroll 32 is driven to revolve horizontally. The gas flowing into the compression chamber 33 flows from the peripheral side of the movable scroll 32 to the center of the movable scroll 32, and the gas is gradually compressed during the flow process, so that the pressure of the gas increases, and the compressed The gas is discharged through the exhaust port 13, and at the same time passes through the impeller 4 provided on the rotating shaft 2, so as to rotate under the driving of the rotating shaft 2, so that the gas gathers to the edge of the impeller 4 under the action of centrifugal force, and The peripheral side of the impeller 4 forms a local high pressure area, and a local low pressure area is formed near the center of the impeller 4, which not only helps to increase the gas pressure on the peripheral side of the movable scroll 32, so that the gas can smoothly flow into the surrounding area. The compression chamber 33 can reduce the gas pressure at the center of the impeller 4, so that the gas at the air inlet 12 can flow toward the low-pressure area at the center of the impeller 4, so that the gas passes through the impeller 4, so that The gas at the gas inlet 12 can continuously flow in, thereby helping to increase the suction volume of the hydrogen circulation pump 100 .

Further, the hydrogen circulation pump 100 further includes a guide vane 5 disposed on the side wall of the installation cavity 11 , and the guide vane 5 is located between the movable scroll 32 and the impeller 4 , and so on Provided, through the guide vanes 5, on the one hand, the fluid on the peripheral side of the impeller 4 can be guided to the peripheral side of the movable scroll 32 to reduce the energy loss of the gas, and on the other hand, the flow rate of the gas can be reduced , to convert part of the kinetic energy of the gas into pressure energy, thereby helping to increase the pressure of the gas.

The compression chamber 33 is formed with a central compression area and a secondary compression area adjacent to the central expansion area from the inside to the outside. When the movable scroll 32 rotates to a specific area, the gas pressure in the secondary compression area will be greater than the The pressure in the central compression zone causes the gas in the secondary compression zone to be over-compressed. For this reason, in this embodiment, the hydrogen circulation pump 100 further includes the guide vanes 5 and the movable scroll 32 The baffle 6 is in sealing contact with the movable scroll 32, and the baffle 6 is provided with a pressure relief groove. Correspondingly, the end plate 34 of the movable scroll 32 is provided with The two pressure relief holes matched with the pressure relief grooves are set in such a way that the pressure relief grooves fit with the movement trajectory of the pressure relief holes, so that when the movable scroll 32 rotates to a specific area, the The secondary compression zone is communicated with the central compression zone to prevent the gas pressure of the secondary compression zone from being greater than the pressure of the central compression zone, and when the movable scroll 32 is outside a certain area, the The secondary compression zone is isolated from the central compression zone to ensure that the gas can continue to be compressed.

There are many ways to connect the guide vane 5 to the housing 1 . The guide vane 5 can be fixed to the housing 1 by riveting, and the guide vane 5 can also be connected to the housing 1 by riveting. Bolts are fixed to the housing 1, etc., which is not limited in the present invention. Specifically, in this embodiment, the guide vanes 5 are detachably installed on the side wall of the installation cavity 11. , adopt a detachable structure, so that the guide vane 5 can be assembled and disassembled, so that the guide vane 5 can be replaced as needed, which is not only convenient for subsequent maintenance, but also helps to adjust the gas pressure in the hydrogen circulation pump 100, so that the Avoid affecting subsequent compressions.

Since the hydrogen circulating pump 100 will generate a lot of heat during operation, if the heat cannot be discharged in time, the scroll structure 3 will be easily deformed by heat, resulting in gas leakage, which will seriously affect the working performance of the hydrogen circulating pump 100. Referring to FIGS. 3 to 5 , the stationary scroll 31 and the movable scroll 32 both include an end plate 34 and a scroll 35 disposed on the end plate 34 , and a cooling cavity 341 is provided in the end plate 34 . The cooling cavity 341 is filled with radiating oil, and the hydrogen circulation pump 100 further includes a cooling pipe 36 arranged in the cooling cavity 341 . On the side of the end plate 34 , the heat dissipation oil provided in the installation cavity 11 can improve the heat dissipation effect of the scroll, and the cooling pipe 36 provided in the installation cavity 11 can pass through the cooling pipe 36 in the installation cavity 11 . , so as to exchange heat with the radiating oil and discharge the absorbed heat out of the installation cavity 11 in time to avoid heat accumulation in the installation cavity 11 , thereby ensuring that the heat can be discharged from the scroll structure 3 in time.

Further, the scroll 35 is provided with a cooling groove 351 that communicates with the cooling cavity 341 , and the cooling groove 351 extends along the extending direction of the scroll 35 , so that the cooling groove 351 passes through the cooling groove 351 . The cooling liquid can flow into the scroll 35 for heat exchange, so as to take away the heat of the scroll 35 in time and reduce the temperature of the cooling scroll 35, thereby helping to improve the cooling scroll structure 3 . cooling effect.

Since the scroll is closer to the middle of the compressor during the working process, the temperature is higher. In order to make the heat evenly distributed in the scroll structure 3 and avoid the local temperature being too high, in this embodiment, the cooling The pipe 36 includes an outer pipe and an inner pipe arranged in the outer pipe. The outer pipe and the inner pipe form two independent cooling channels, and the liquid flow directions in the two cooling channels are opposite to each other. , the cooling liquid in the inner and outer pipes can realize heat exchange, which can make the temperature distribution in the scroll more uniform while ensuring the heat dissipation effect, which helps to avoid the local temperature being too high.

In order to take away the heat in the installation cavity 11 in time, in this embodiment, the cooling pipe 36 is arranged in a vortex, so that the shape of the cooling pipe 36 is the same as the shape of the scroll structure 3 . It is adapted so that the cooling pipes 36 can sufficiently exchange heat, so that the cooling pipes 36 can take away more heat, thereby helping to improve the heat dissipation effect of the cooling pipes 36 .

In addition, the present invention also provides a hydrogen fuel power system and a hydrogen fuel vehicle. The hydrogen fuel vehicle includes the hydrogen fuel power system. As long as the hydrogen fuel vehicle includes the hydrogen fuel power system, it is within the scope of the present invention. Within the scope of protection, the hydrogen fuel power system includes the hydrogen circulation pump 100 in the above solution. It should be noted that the structure of the hydrogen circulation pump 100 in the hydrogen fuel power system can refer to the above-mentioned hydrogen circulation pump 100. Embodiments are not repeated here; since the above-mentioned hydrogen circulation pump 100 is used in the hydrogen fuel power system provided by the present invention, the embodiments of the hydrogen fuel power system provided by the present invention include all the above-mentioned hydrogen circulation pumps 100 All the technical solutions of the embodiments, and the technical effects achieved are also the same, and will not be repeated here.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Under the conception of the present invention, any equivalent structural transformations made by using the contents of the description and accompanying drawings of the present invention, or Direct/indirect applications in other related technical fields are included in the scope of patent protection of the present invention.

Claims (10)

1. A hydrogen circulation pump, characterized by comprising:

the air inlet structure comprises a shell, a first air inlet and a second air inlet, wherein the shell is provided with a mounting cavity, and the upper part of the mounting cavity is provided with an air inlet;

the rotating shaft is rotatably arranged in the mounting cavity along the vertical axis;

the scroll disc structure comprises a static scroll disc and a movable scroll disc which are arranged in the mounting cavity, the movable scroll disc is arranged at the lower end of the rotating shaft and is driven by the rotating shaft to eccentrically rotate, the static scroll disc is positioned below the movable scroll disc and is matched with the movable scroll disc to form a compression chamber, and an end plate of the static scroll disc is provided with an exhaust port communicated with the compression chamber; and the number of the first and second groups,

the impeller is sleeved on the peripheral side of the rotating shaft and located above the movable scroll disk, and the impeller is driven by the rotating shaft to rotate and is used for guiding gas in the middle of the installation cavity to the peripheral side of the installation cavity.

2. The hydrogen circulation pump of claim 1, further comprising a deflector grill disposed on a side wall of the mounting chamber, the deflector grill being between the orbiting scroll and the impeller.

3. The hydrogen circulation pump of claim 2, further comprising a baffle plate disposed between the guide grid and the orbiting scroll, the baffle plate being in sealing contact with the orbiting scroll, the baffle plate being provided with a pressure relief groove;

correspondingly, the end plate of the movable scroll disk is provided with two pressure relief holes matched with the pressure relief grooves.

4. The hydrogen circulation pump of claim 2, wherein the flow guide grid is removably mounted to a side wall of the mounting cavity.

5. The hydrogen circulation pump of claim 1, wherein the fixed scroll and the orbiting scroll each comprise an end plate and a wrap provided to the end plate;

a cooling cavity is arranged in the end plate, and heat dissipation oil is filled in the cooling cavity;

the hydrogen circulating pump is characterized by further comprising a cooling pipe arranged in the cooling cavity, one end of the cooling pipe is arranged in the middle of the end plate, and the other end of the cooling pipe is arranged on the side of the end plate.

6. The hydrogen circulation pump according to claim 5, wherein the scroll is provided with a cooling groove communicating with the cooling chamber, the cooling groove extending in an extending direction of the scroll.

7. The hydrogen circulation pump according to claim 5, wherein the cooling pipe comprises an outer pipe and an inner pipe provided in the outer pipe, the outer pipe and the inner pipe forming two cooling flow paths independent of each other;

the liquid flow directions in the two cooling flow channels are opposite.

8. The hydrogen circulation pump of claim 5, wherein the cooling tube is in a vortex arrangement.

9. A hydrogen-fueled power system characterized by comprising the hydrogen circulation pump according to any one of claims 1 to 8.

10. A hydrogen-fueled vehicle, comprising the hydrogen-fueled power system of claim 9.

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