Impeller, compressor and energy storage system with compressor

Abstract

The utility model discloses an impeller, a compressor and an energy storage system with the compressor. The first blades are arranged on one side of the wheel disc in the thickness direction; the second blades are arranged on the other side of the wheel disc in the thickness direction; wherein the size of the first blade in the axial direction is larger than that of the second blade in the axial direction. According to the impeller designed by the utility model, the blades are asymmetrically arranged on the two sides of the impeller, so that the flowing direction of gas can be ensured, the axial size is reduced, and higher compression efficiency is realized.

Description

Technical Field

[0001] The utility model relates to the field of compressors, in particular to an impeller, a compressor and an energy storage system having the same. Background Art

[0002] In related technologies, a compressor is provided with an impeller to compress the fluid. In some existing technologies, the blades are located on one side of the impeller, which generates a large axial force when the impeller is working and causes a large rotor load. In other existing technologies, the blades are symmetrically arranged on both sides of the impeller, but their structure is complex and their axial dimensions are large. Utility Model Content

[0003] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide an impeller. The impeller designed according to the present invention has blades asymmetrically arranged on both sides of the impeller, which can ensure the direction of gas flow, reduce the axial dimension, and achieve higher compression efficiency.

[0004] The utility model also provides a compressor having the impeller.

[0005] The utility model also provides an energy storage system having the compressor.

[0006] According to the utility model, the impeller includes: a wheel disc; a first blade, which is arranged on one side in the thickness direction of the wheel disc; and a second blade, which is arranged on the other side in the thickness direction of the wheel disc; wherein the axial size of the first blade is larger than the axial size of the second blade.

[0007] According to the utility model, the impeller is provided with a first blade and a second blade of different axial sizes on both sides of the wheel disc. The axial forces generated by the blades on both sides when rotating are in opposite directions, which can reduce the overall axial force of the impeller. In addition, the impeller has a simple structure and a small axial size, and can also guide the fluid to flow from the first blade to the second blade to ensure the flow direction of the fluid.

[0008] According to some embodiments of the present invention, the axial size of the first blade is L1, the axial size of the second blade is L2, and they satisfy: L1 / L2≥1.2.

[0009] According to some embodiments of the present invention, L1 satisfies: 500mm≤L1≤700mm, and L2 satisfies: 200mm≤L2≤400mm.

[0010] According to some embodiments of the present invention, the first blade extends from the radial inner side to the radial outer side and bends toward one side in the circumferential direction; the second blade extends from the radial inner side to the radial outer side and bends toward one side in the circumferential direction; the bending direction of the first blade is consistent with the bending direction of the second blade.

[0011] According to some embodiments of the present invention, the first blades are configured as a plurality of blades spaced apart in the circumferential direction, and a first channel is formed between two adjacent first blades; the second blades are configured as a plurality of blades spaced apart in the circumferential direction, and a second channel is formed between two adjacent second blades; wherein the axial projections of the first channel and the second channel at least partially overlap.

[0012] According to some embodiments of the present invention, each first blade and each second blade are correspondingly arranged in the axial direction, the number of the first blades is the same as the number of the second blades, and each first channel corresponds to one second channel.

[0013] According to some embodiments of the present invention, the impeller also includes: a rotating shaft, which is arranged on the wheel disc and protrudes from both sides in the thickness direction of the wheel disc, and the first blade and the second blade are respectively connected to the rotating shaft; wherein the end face of the first blade axially away from the second blade is constructed as a first end face, and the first end face is connected to the end face of one end of the rotating shaft and is located in the same plane; the end face of the second blade axially away from the first blade is constructed as a second end face, and the second end face is connected to the end face of the other end of the rotating shaft and is located in the same plane.

[0014] The following briefly describes a compressor according to an embodiment of the second aspect of the present invention.

[0015] The compressor according to the present invention includes: a housing having a compression chamber formed therein, the housing further having an air inlet and an air outlet communicating with the compression chamber; and an impeller configured as any of the impellers described in the above embodiments, wherein the first blades are disposed adjacent to the air inlet, and the second blades are disposed adjacent to the air outlet. Because the compressor according to the present invention is provided with the impeller described in the above embodiments, the compressor has a higher compression efficiency.

[0016] According to some embodiments of the present invention, the impeller is constructed in plurality and the plurality of impellers are stacked in the axial direction, and the first blade of one of the two adjacent impellers is directly opposite to the second blade of the other impeller.

[0017] The energy storage system according to the third embodiment of the present utility model is briefly described below.

[0018] The energy storage system according to the present invention includes the energy storage system described in any one of the above embodiments. Since the energy storage system according to the present invention is provided with the compressor described in the above embodiments, the energy storage system has higher working efficiency.

[0019] To sum up, according to the utility model, the blades of the impeller are asymmetrically arranged on both sides of the impeller. The axial forces generated by the blades on both sides when rotating are in opposite directions, which can reduce the overall axial force of the impeller, ensure the direction of gas flow, and reduce the axial size to achieve higher compression efficiency.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is an overall structural diagram of a compressor according to an embodiment of the present utility model.

[0023] Figure 2 yes Figure 1 Cross-sectional view of the structure.

[0024] Figure 3 It is a schematic diagram of the arrangement of multiple impellers according to an embodiment of the present utility model.

[0025] Figure 4 It is a front view of a side of an impeller provided with a first blade according to an embodiment of the present utility model.

[0026] Figure 5 It is a side view of an impeller according to an embodiment of the present utility model.

[0027] Reference numerals:

[0028] 1. Compressor;

[0029] 10. Shell; 10a. Compression chamber; 11. Air inlet; 12. Air outlet;

[0030] 20. Impeller; 21. Wheel; 22. First blade; 221. First end surface; 23. Second blade; 231. Second end surface; 24. Rotating shaft;

[0031] 30. Main axis. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or mutual communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] In related technologies, a compressor is provided with an impeller to compress the fluid. In some existing technologies, the blades are located on one side of the impeller, which generates a large axial force when the impeller is working and causes a large rotor load. In other existing technologies, the blades are symmetrically arranged on both sides of the impeller, but their structure is complex and their axial dimensions are large.

[0038] Reference below Figure 4-Figure 5 An impeller 20 according to an embodiment of the present invention will be described.

[0039] like Figure 4-Figure 5 As shown, the impeller 20 according to the present invention includes: a disk 21, first blades 22, and second blades 23. The first blades 22 are arranged on one side of the disk 21 in the thickness direction; the second blades 23 are arranged on the other side of the disk 21 in the thickness direction. The axial size of the first blades 22 is larger than the axial size of the second blades 23. Specifically, the impeller 20 rotates to drive the movement of the fluid near the impeller 20. The axial size of the first blades 22 is larger than the axial size of the second blades 23. This makes the force exerted by the first blades 22 on the fluid greater than the force exerted by the second blades 23 on the fluid. At this time, the fluid will flow from the direction where the first blades 22 are arranged on the impeller 20 toward the direction where the second blades 23 are arranged on the impeller 20.

[0040] In some embodiments, the fluid may be gas, and the impeller 20 is used to compress the gas. The first blades 22 with a larger axial size can ensure the compression efficiency of the impeller 20 on the gas, and the second blades 23 with a smaller axial size can reduce the overall axial size of the impeller 20.

[0041] According to the utility model, the impeller 20 is provided with a first blade 22 and a second blade 23 with different axial sizes on both sides of the wheel disc 21. The axial forces generated by the blades on both sides when rotating are in opposite directions, which can reduce the overall axial force of the impeller 20. In addition, the impeller 20 has a simple structure and a small axial size, and can also guide the fluid to flow from the first blade 22 to the second blade 23 to ensure the flow direction of the fluid.

[0042] Furthermore, the impeller 20 according to the present invention is applicable to equipment such as the compressor 1 that requires the impeller 20 for compression.

[0043] According to some embodiments of the present invention, Figure 5 As shown, the axial size of the first blade 22 is L1, and the axial size of the second blade 23 is L2, and they satisfy: L1 / L2≥1.2, so as to reduce the overall axial size of the impeller 20 while ensuring the gas compression efficiency of the impeller 20.

[0044] In some embodiments, the ratio of the axial dimensions of the first blade 22 to the second blade 23 satisfies L1 / L2 = 2.

[0045] According to some embodiments of the present invention, Figure 5 As shown, L1 satisfies: 500mm≤L1≤700mm, L2 satisfies: 200mm≤L2≤400mm. In some embodiments, the overall axial dimension of the impeller 20 is 1000mm, and the sum of the axial dimensions of the first blade 22 and the second blade 23 is not greater than the overall axial dimension of the impeller 20.

[0046] According to some embodiments of the present invention, Figure 4-Figure 5 As shown, the first blade 22 extends from the radial inner side to the radial outer side and bends toward one side in the circumferential direction; the second blade 23 extends from the radial inner side to the radial outer side and bends toward one side in the circumferential direction; the bending direction of the first blade 22 is consistent with the bending direction of the second blade 23. At this time, the force exerted by the first blade 22 on the gas is consistent with the direction of the force exerted by the second blade 23 on the gas, and the axial force generated when the first blade 22 rotates is opposite to the axial force generated when the second blade 23 rotates. The axial forces generated when the blades on both sides rotate can offset each other to a part, so that the total axial force is greatly reduced.

[0047] In some embodiments, the size of the impeller 20 and the sizes and bending angles of the first blades 22 and the second blades 23 are not fixed, and can be adjusted and manufactured into impellers 20 of different sizes and bending angles according to actual needs.

[0048] In some embodiments, the first blade 22 and the second blade 23 can be made of different materials, and the different material properties can be used to better meet actual application conditions or reduce production costs. The application of different material properties can better meet actual working conditions and have a wider applicability.

[0049] When the first blades 22 and the second blades 23 rotate, they stir the airflow and guide the airflow toward the outside in the radial direction.

[0050] According to some embodiments of the present invention, Figure 4-Figure 5 As shown, the first blades 22 are constructed as a plurality of circumferentially spaced apart blades, and a first channel is formed between two adjacent first blades 22; the second blades 23 are constructed as a plurality of circumferentially spaced apart blades, and a second channel is formed between two adjacent second blades 23; wherein the axial projections of the first channel and the second channel at least partially overlap, and when the first blades 22 rotate, they stir the airflow located at the first channel and guide the airflow toward the radially outer side, and the airflow remaining in the first channel can flow to the second channel and when the second blades 23 rotate, the airflow located at the second channel can be guided to flow toward the radially outer side, and the axial projections of the first channel and the second channel at least partially overlap to fully compress the airflow.

[0051] According to some embodiments of the present invention, Figure 4-Figure 5 As shown, each first blade 22 and each second blade 23 are arranged correspondingly in the axial direction and the number of first blades 22 is the same as the number of second blades 23. Each first channel corresponds to a second channel. At this time, the airflow remaining in the first channel can flow to the corresponding second channel, so that the airflow remaining in each first channel can enter the corresponding second channel, so that the impeller 20 can fully compress the airflow.

[0052] According to some embodiments of the present invention, Figure 4-Figure 5 As shown, the impeller 20 further includes a rotating shaft 24, which is provided on both sides of the wheel disc 21 and protrudes in the thickness direction of the wheel disc 21, and the first blade 22 and the second blade 23 are respectively connected to the rotating shaft 24; wherein the end face of the first blade 22 in the axial direction away from the second blade 23 is configured as a first end face 221, and the first end face 221 is connected to the end face of one end of the rotating shaft 24 and is located in the same plane; the end face of the second blade 23 in the axial direction away from the first blade 22 is configured as a second end face 231, and the second end face 231 is connected to the end face of the other end of the rotating shaft 24 and is located in the same plane. Specifically, the impeller 20 rotates with the rotating shaft 24 as the axis, as shown in FIG. Figure 5 As shown, the two side end faces of the impeller 20 in the axial direction are respectively the first end face 221 and the second end face 231, and the two ends of the rotating shaft 24 in the axial direction extend to the first end face 221 and the second end face 231 respectively, so that multiple impellers 20 can be stacked or the impeller 20 can be arranged adjacent to other structures to reduce the space occupied by the impeller 20.

[0053] The compressor 1 according to the present invention is briefly described below.

[0054] like Figure 1-Figure 3 As shown, the compressor 1 according to the present invention includes: a housing 10 and an impeller 20. A compression chamber 10a is formed inside the housing 10. The housing 10 also forms an air inlet 11 and an air outlet 12 that are connected to the compression chamber 10a. The impeller 20 is constructed as the impeller 20 described in any one of the above embodiments, with the first blade 22 being disposed adjacent to the air inlet 11 and the second blade 23 being disposed adjacent to the air outlet 12. Specifically, when the compressor 1 is operating, gas is sucked into the compression chamber 10a from the air inlet 11 and rotates with the impeller 20. The gas is subjected to centrifugal force, enters the first channel and the second channel, and is radially thrown out of the first channel and the second channel to obtain kinetic energy. Under the action of the impeller 20, the pressure and flow rate of the gas increase, and the compressed gas is discharged from the compression chamber 10a through the exhaust port.

[0055] Since the compressor 1 according to the present invention is provided with the impeller 20 of the above embodiment, the compression efficiency of the compressor 1 is higher.

[0056] In some embodiments, the compressor 1 is further provided with a main shaft 30 , and the rotating shaft 24 of the impeller 20 is provided with a through hole. The main shaft 30 is passed through the impeller 20 through the through hole. When the main shaft 30 rotates, it can drive the impeller 20 to rotate.

[0057] According to some embodiments of the present invention, Figure 1-Figure 3 As shown, the impeller 20 is constructed as a plurality of impellers 20 stacked in the axial direction, with the first blade 22 of one impeller 20 of two adjacent impellers 20 facing the second blade 23 of the other impeller 20. Specifically, the plurality of impellers 20 are disposed on the main shaft 30. The impellers 20 rotate within the compression chamber 10a, generating a negative pressure around them. This negative pressure draws gas into the first and second channels of the impellers 20. Since the impellers 20 rotate continuously, the centrifugal force generated is transmitted to the gas, causing the gas to be thrown radially outward. The gas flows from the impeller 20 adjacent to the air inlet 11 toward the impeller 20 adjacent to the air outlet 12. The gas is gradually pressurized by the plurality of impellers 20 arranged in sequence and finally discharged from the exhaust port. The impellers 20 rotate continuously, and the gas is continuously drawn into the compression chamber 10a and thrown out, thereby maintaining a continuous flow of gas.

[0058] The energy storage system according to the present utility model is briefly described below.

[0059] The energy storage system according to the present invention includes the energy storage system described in any one of the above embodiments. Since the energy storage system according to the present invention is provided with the compressor 1 described in the above embodiments, the energy storage system has higher working efficiency.

[0060] To sum up, according to the utility model, the blades of the impeller 20 are asymmetrically arranged on both sides of the impeller. The axial forces generated by the blades on both sides when rotating are in opposite directions, which can reduce the overall axial force of the impeller 20, ensure the direction of gas flow, and reduce the axial size to achieve higher compression efficiency.

[0061] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0062] While embodiments of the present invention have been shown and described above, changes, modifications, substitutions, and variations may be made to the embodiments described above.

Claims

1. An impeller (20), characterized in that: include: Roulette (21); a first blade (22), the first blade (22) being arranged on one side of the wheel disc (21) in a thickness direction; a second blade (23), the second blade (23) being arranged on the other side of the wheel disc (21) in the thickness direction; in The size of the first blade (22) in the axial direction is larger than the size of the second blade (23) in the axial direction.

2. The impeller (20) according to claim 1, characterized in that The axial dimension of the first blade (22) is L1, and the axial dimension of the second blade (23) is L2, and they satisfy: L1 / L2≥1.

2.

3. The impeller (20) according to claim 2, characterized in that The L1 satisfies: 500mm≤L1≤700mm, and the L2 satisfies: 200mm≤L2≤400mm.

4. The impeller (20) according to claim 1, characterized in that The first blade (22) extends from the radial inner side to the radial outer side and bends toward one side in the circumferential direction; The second blade (23) extends from the radial inner side to the radial outer side and bends toward one side in the circumferential direction; The bending direction of the first blade (22) is consistent with the bending direction of the second blade (23).

5. The impeller (20) according to claim 4, characterized in that The first blades (22) are configured as a plurality of blades spaced apart in the circumferential direction, and a first channel is formed between two adjacent first blades (22); the second blades (23) are configured as a plurality of blades spaced apart in the circumferential direction, and a second channel is formed between two adjacent second blades (23); wherein The projections of the first channel and the second channel in the axial direction at least partially overlap.

6. The impeller (20) according to claim 5, characterized in that Each first blade (22) and each second blade (23) are correspondingly arranged in the axial direction, the number of the first blades (22) is the same as the number of the second blades (23), and each first channel corresponds to one second channel.

7. The impeller (20) according to claim 1, characterized in that Also includes: A rotating shaft (24) is provided on the wheel disc (21) and protrudes from both sides of the wheel disc (21) in a thickness direction, and the first blade (22) and the second blade (23) are respectively connected to the rotating shaft (24); wherein The end surface of the first blade (22) facing away from the second blade (23) in the axial direction is configured as a first end surface (221), and the first end surface (221) is connected to the end surface of one end of the rotating shaft (24) and is located in the same plane; The end surface of the second blade (23) facing away from the first blade (22) in the axial direction is configured as a second end surface (231). The second end surface (231) is connected to the end surface of the other end of the rotating shaft (24) and is located in the same plane.

8. A compressor (1), characterized in that include: A housing (10), wherein a compression chamber (10a) is formed inside the housing (10), and the housing (10) is further formed with an air inlet (11) and an air outlet (12) communicating with the compression chamber (10a); An impeller (20), wherein the impeller (20) is constructed as the impeller (20) according to any one of claims 1 to 7, wherein the first blades (22) are arranged adjacent to the air inlet (11), and the second blades (23) are arranged adjacent to the air outlet (12).

9. The compressor (1) according to claim 8, characterized in that The impeller (20) is constructed in a plurality and the plurality of impellers (20) are stacked in the axial direction, and the first blade (22) of one impeller (20) of two adjacent impellers (20) is directly opposite to the second blade (23) of the other impeller (20).

10. An energy storage system, characterized in that: Comprising the compressor (1) according to claim 8 or 9.

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