Impeller and water vapor compressor

Abstract

The utility model provides an impeller and a water vapor compressor. The impeller comprises a base body and a plurality of blades connected with the base body, a cavity is formed in the base body, and the cavity is filled with a lattice structure; the crystal lattice structure comprises a plurality of crystal lattice units, at least one hole is formed in each crystal lattice unit, the crystal lattice units are arranged in a virtual cube, and each crystal lattice unit is provided with a first surface group, a second surface group, a third surface group, a fourth surface group, a fifth surface group and a sixth surface group which are attached to six surfaces of the virtual cube respectively; the first face set and the second face set are oppositely arranged and extend in a zigzag mode in the first direction, the third face set and the fourth face set are oppositely arranged and extend in the zigzag mode in the second direction, the fifth face set and the sixth face set are oppositely arranged and extend in the zigzag mode in the third direction, and every two of the first direction, the second direction and the third direction are perpendicular. The problem of critical rotating speed of the rotor in the working rotating speed range can be solved, and the working reliability and stability of the water vapor compressor can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a impeller and a water vapor compressor. BACKGROUND

[0002] As a new generation of refrigerant, water has many advantages such as environmental friendliness, wide raw material sources, low exploitation cost, high stability coefficient and sufficient heat storage. However, the water vapor has small molecular weight, high adiabatic index and large specific volume, so the compressor using water vapor as a new generation of refrigerant has higher standards than the compressor using traditional refrigerants.

[0003] A water vapor compressor in the related art has a critical speed problem when the rotor system is working, which seriously endangers the stability and reliability of the water vapor compressor. CONTENT OF THE INVENTION

[0004] Embodiments of the present application provide an impeller and a water vapor compressor, aiming to improve the problem of low stability and reliability of the water vapor compressor.

[0005] In a first aspect, an impeller is provided. The impeller comprises a base body and a plurality of blades connected to the base body, the base body has a cavity inside, and the cavity is filled with a lattice structure; the lattice structure comprises a plurality of lattice units, each lattice unit has at least one hole, each lattice unit is arranged in a virtual cube, and each lattice unit has a first face group, a second face group, a third face group, a fourth face group, a fifth face group and a sixth face group which respectively adhere to six faces of the virtual cube; the first face group and the second face group are oppositely arranged and extend in a first direction, the third face group and the fourth face group are oppositely arranged and extend in a second direction, and the fifth face group and the sixth face group are oppositely arranged and extend in a third direction; the first direction, the second direction and the third direction are perpendicular to each other.

[0006] The impeller of the embodiments of the present application has a lattice structure filled in the cavity inside the base body, and the lattice units of the lattice structure have holes, and the lattice structure has excellent bearing capacity and stress distribution in three perpendicular directions. Therefore, when the impeller is installed on the driving shaft of the water vapor compressor, the overall weight of the driving shaft and the impeller can be reduced while ensuring the strength and rigidity, thereby improving the problem of critical speed of the rotor in the working speed range, and improving the reliability and stability of the water vapor compressor.

[0007] In some embodiments, the lattice unit is provided with a first hole and a second hole, both of which communicate with the first group of faces, the second group of faces, the third group of faces, the fourth group of faces, the fifth group of faces and the sixth group of faces. In this way, the amount of material of the lattice unit can be further reduced, so that the weight of the impeller can be further reduced under the condition of ensuring the strength and rigidity, thereby facilitating the improvement of the reliability and stability of the water vapor compressor in operation.

[0008] In some embodiments, the first hole and the second hole are arranged in the first direction with their orthographic projections on the plane where the first group of faces is located and the plane where the second group of faces is located; the first hole and the second hole are arranged in the second direction with their orthographic projections on the third group of faces and the fourth group of faces; the first hole and the second hole are arranged in the third direction with their orthographic projections on the fifth group of faces and the sixth group of faces.

[0009] The first hole and the second hole can enhance the carrying capacity of the lattice unit in the first direction, the second direction and the third direction, thereby ensuring the strength and rigidity of the impeller. In addition, the first hole and the second hole are regularly arranged in the lattice unit, so that the mass distribution of the lattice structure is more uniform, avoiding the imbalance problem of the impeller due to uneven mass distribution, and improving the stability and reliability of the impeller in high-speed rotation. In this way, it is beneficial to further improve the reliability and stability of the water vapor compressor in operation.

[0010] In some embodiments, the wall surface of the first hole and the second hole is a curved surface; the orthographic projection of the first hole and the second hole on the plane where the first group of faces is located, the plane where the second group of faces is located, the plane where the third group of faces is located, the plane where the fourth group of faces is located, the plane where the fifth group of faces is located and the plane where the sixth group of faces is located is a circle with equal diameters.

[0011] In this way, on the one hand, it can further avoid the stress concentration condition in the interior of the lattice unit, thereby facilitating the further improvement of the strength and rigidity of the lattice structure. On the other hand, the first hole and the second hole can form a regular and symmetrical three-dimensional hole network in the interior of the lattice unit, thereby further improving the uniformity of the mass distribution of the lattice structure, and thereby facilitating the further improvement of the reliability and stability of the water vapor compressor in operation.

[0012] In some embodiments, the first face group and the second face group have the same structure, and each of the first face group and the second face group comprises a first plane, a second plane and a third plane extending in a zigzag manner along the first direction, and the second plane and the third plane are located on two sides of the first plane and are arranged in central symmetry. In this way, the stress uniformity of the lattice unit can be further improved, thereby facilitating further improvement of the strength and rigidity of the lattice structure.

[0013] In some embodiments, the third face group and the fourth face group have the same structure, and each of the third face group and the fourth face group comprises a fourth plane, a fifth plane and a sixth plane extending in a zigzag manner along the second direction, and the fifth plane and the sixth plane are located on two sides of the fourth plane and are arranged in central symmetry. In this way, the stress uniformity of the lattice unit can be further improved, thereby facilitating further improvement of the strength and rigidity of the lattice structure.

[0014] In some embodiments, the fifth face group and the sixth face group have the same structure, and each of the fifth face group and the sixth face group comprises a seventh plane, an eighth plane and a ninth plane extending in a zigzag manner along the third direction, and the eighth plane and the ninth plane are located on two sides of the seventh plane and are arranged in central symmetry. In this way, the stress uniformity of the lattice unit can be further improved, thereby facilitating further improvement of the strength and rigidity of the lattice structure.

[0015] In some embodiments, the thickness of the lattice unit is greater than or equal to 0.8 mm. In this way, the carrying capacity of the lattice unit can be further improved, thereby facilitating further improvement of the strength and rigidity of the lattice structure.

[0016] In some embodiments, the lattice unit is a three-period minimal surface lattice unit. In this way, on the one hand, the lightweight demand of the impeller can be realized while ensuring the strength and rigidity, thereby facilitating improvement of the reliability and stability of the water vapor compressor.

[0017] In some embodiments, the plurality of blades comprises a plurality of first blades and a plurality of second blades, the length of the first blades is greater than the length of the second blades, and each of the second blades is arranged between two adjacent first blades. In this way, during the operation of the compressor, the blades of the impeller can more effectively capture and compress the gas, and the airflow can be more uniformly distributed during rotation, thereby reducing vibration, noise and energy loss, and thereby facilitating improvement of the working efficiency of the compressor.

[0018] In some embodiments, the blade has a leading edge and a trailing edge opposite to the leading edge, and the leading edge of the blade is curved. In the first aspect, the flow field distribution of the inlet end can be improved, the airflow passes through the blade more smoothly, the turbulence and energy loss of the airflow are reduced, and the impact of the airflow on the blade is reduced, thereby improving the fatigue resistance of the blade, prolonging the service life of the blade, and further improving the stability and reliability of the water vapor compressor. In the second aspect, the vibration and noise of the water vapor compressor can be reduced. In the third aspect, the resistance of the blade leading edge to the airflow can be reduced, the airflow can utilize energy more efficiently, and the working efficiency of the water vapor compressor can be improved.

[0019] In some embodiments, the leading edge of the blade is one of an elliptical surface, a circular arc surface, and a parabolic surface.

[0020] In some embodiments, the impeller is a titanium alloy impeller. In this way, the strength and rigidity of the impeller can be further improved, and the stability and reliability of the water vapor compressor can be further improved.

[0021] In the second aspect, the embodiments of the present application provide a water vapor compressor, which comprises a driving shaft and at least one impeller as described in the first aspect, and the impeller is connected to the driving shaft. In this way, the overall weight of the driving shaft and the impeller can be reduced while ensuring the strength and rigidity, thereby improving the problem of critical speed of the rotor in the working speed range, and further improving the reliability and stability of the water vapor compressor.

[0022] In some embodiments, the impeller is two, and the two impellers are respectively connected to the two ends of the driving shaft opposite to each other. The axial forces of the two impellers can cancel each other out to a certain extent, so that the axial resultant force acting on the driving shaft is reduced, thereby reducing the stress on the key supporting components such as bearings, and improving the stability and reliability of the water vapor compressor. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 The structure schematic diagram of the impeller provided by an embodiment of the present application is shown in the figure;

[0025] Figure 2 The cross-sectional structure schematic diagram of the impeller provided by an embodiment of the present application is shown in the figure;

[0026] Figure 3A structural schematic view of a lattice unit provided by an embodiment of the present application is shown in FIG. 1.

[0027] Figure 4 A structural schematic view of a first face group of a lattice unit provided by an embodiment of the present application is shown in FIG. 2.

[0028] Figure 5 A structural schematic view of a third face group of a lattice unit provided by an embodiment of the present application is shown in FIG. 3.

[0029] Figure 6 A structural schematic view of a fifth face group of a lattice unit provided by another embodiment of the present application is shown in FIG. 4.

[0030] Figure 7 A structural schematic view of a fifth face group of a lattice unit provided by another embodiment of the present application is shown in FIG. 4. Figure 1 A structural schematic view of an enlarged structure at M in FIG. 4 is shown in FIG. 5.

[0031] Explanation of reference numerals:

[0032] 10 - impeller

[0033] 100 - base, 101 - cavity, 110 - lattice structure, 111 - lattice unit, 1111 - hole, 1111a - first hole, 1111b - second hole, 112 - first face group, 1121 - first plane, 1122 - second plane, 1123 - third plane, 113 - second face group, 114 - third face group, 1141 - fourth plane, 1142 - fifth plane, 1143 - sixth plane, 115 - fourth face group, 116 - fifth face group, 1161 - seventh plane, 1162 - eighth plane, 1163 - ninth plane, 117 - sixth face group

[0034] 200 - blade, 201 - leading edge, 202 - trailing edge, 210 - first blade, 220 - second blade DETAILED DESCRIPTION

[0035] The principles and features of the present application are described below in conjunction with the accompanying drawings, which are presented only for the purpose of explanation and are not intended to limit the scope of the present application.

[0036] As shown in FIG. 1, a lattice unit 111 is provided by an embodiment of the present application. Figures 1 to 4As shown, the embodiment of the first aspect of the present application proposes a impeller 10. The impeller 10 comprises a base body 100 and a plurality of blades 200 connected with the base body 100, the inside of the base body 100 is provided with a cavity 101, the cavity 101 is filled with a lattice structure 110, the lattice structure 110 comprises a plurality of lattice units 111, the lattice unit 111 is formed with at least one hole 1111, the lattice unit 111 is arranged in a virtual cube S, the lattice unit 111 has a first face group 112, a second face group 113, a third face group 114, a fourth face group 115, a fifth face group 116 and a sixth face group 117 respectively adhering to the six faces of the virtual cube S, the first face group 112 and the second face group 113 are oppositely arranged and extend along a first direction X, the third face group 114 and the fourth face group 115 are oppositely arranged and extend along a second direction Y, the fifth face group 116 and the sixth face group 117 are oppositely arranged and extend along a third direction Z, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0037] The base body 100 is the basic part of the impeller, which provides connection support for the blades 200. At the same time, the cavity 101 arranged inside is also used to fill the lattice structure 110.

[0038] The lattice structure 110 is spliced in space by a plurality of lattice units 111, and the hole 1111 of the lattice unit 111 can effectively reduce the weight of the lattice structure 110. Further, the lattice unit 111 is located in the virtual cube S, and the two opposite face groups in the lattice unit 111 extend in the same direction, and any two adjacent face groups extend in two mutually perpendicular directions. Therefore, the lattice structure 110 has good stress distribution and bearing capacity in three mutually perpendicular directions. Optionally, the length of the virtual cube S can be between 1mm-10mm, such as 1.5mm, 3mm, 5mm, 10mm, etc., which can be designed flexibly according to the size of the cavity 101. It is easy to understand that when the lattice structure 110 composed of a plurality of periodically repeated lattice units 111 is filled in the cavity 101, the lattice structure 110 will be partially designed and cut to match the inner wall of the cavity 101.

[0039] The impeller 10 of the embodiment of the present application is filled with the lattice structure 110 in the cavity 101 inside the base body 100, the lattice unit 111 of the lattice structure 110 is provided with the hole 1111, and the lattice structure 110 has excellent bearing capacity and stress distribution in three mutually perpendicular directions. On the one hand, when the impeller 10 bears complex centrifugal force, fluid pressure, vibration and other loads, the stress distribution of the lattice structure 110 in each direction is more uniform, so that the impeller 10 is not easy to deform or damage, thereby facilitating to improve the structural strength of the impeller 10. On the other hand, compared with the solid structure, the material usage of the lattice structure 110 can be effectively reduced, thereby facilitating to reduce the weight of the impeller 10 and realize the lightweight demand of the impeller 10. Therefore, when the impeller 10 is installed on the driving shaft of the water vapor compressor, the overall weight of the driving shaft and the impeller 10 can be reduced under the condition of ensuring the strength and rigidity, thereby facilitating to improve the problem of critical speed of the rotor in the working speed range, and further facilitating to improve the reliability and stability of the water vapor compressor.

[0040] In some embodiments, the lattice unit 111 is a triply periodic minimal surface lattice unit 111. The triply periodic minimal surface (TPMS) refers to a three-dimensional geometric structure with zero average curvature at any point on the surface, which has the advantages of high strength, lightweight, high surface area-volume ratio, etc. It can be understood that the lattice unit 111 is a triply periodic minimal surface lattice unit 111, and the lattice structure 110 formed thereby is also a triply periodic minimal surface lattice structure.

[0041] Optionally, the triply periodic minimal surface lattice unit 111 can be designed based on one of the types of Schwarz P surface, Gyroid surface, Diamond surface, etc. Preferably, the triply periodic minimal surface lattice unit 111 is a Gyroid surface lattice unit 111.

[0042] In the embodiment, the lattice unit 111 is set as a triply periodic minimal surface lattice unit 111. In this way, on the one hand, the lightweight demand of the impeller 10 can be realized under the condition of ensuring the strength and rigidity, thereby facilitating to improve the reliability and stability of the water vapor compressor. On the other hand, the lattice unit 111 can be formed based on the surface equation through 3D printing technology, thereby also facilitating to improve the convenience and reliability of the impeller 10 manufacturing.

[0043] In some embodiments, as Figure 3 and Figure 4As shown, the lattice unit 111 is provided with first holes 1111a and second holes 1111b, and each of the first holes 1111a and the second holes 1111b communicates with the first face group 112, the second face group 113, the third face group 114, the fourth face group 115, the fifth face group 116 and the sixth face group 117.

[0044] In the embodiment, the lattice unit 111 is formed with the first holes 1111a and the second holes 1111b, and each of the holes communicates with six face groups. In this way, the amount of material of the lattice unit 111 can be further reduced, so that the weight of the impeller 110 can be further reduced under the condition of ensuring the strength and rigidity, and thus the reliability and stability of the water vapor compressor in operation can be improved.

[0045] In some embodiments, as Figures 3 to 6 As shown, the first holes 1111a and the second holes 1111b are arranged in the first direction X in the orthographic projection on the plane where the first face group 112 is located and the plane where the second face group 113 is located, the first holes 1111a and the second holes 1111b are arranged in the second direction Y in the orthographic projection on the third face group 114 and the fourth face group 115, and the first holes 1111a and the second holes 1111b are arranged in the third direction Z in the orthographic projection on the fifth face group 116 and the sixth face group 117.

[0046] The first holes 1111a and the second holes 1111b can enhance the carrying capacity of the lattice unit 111 in the first direction X, the second direction Y and the third direction Z, and thus ensure the strength and rigidity of the impeller 10. In addition, the first holes 1111a and the second holes 1111b are regularly arranged in the lattice unit 111, so that the mass distribution of the lattice structure 110 is more uniform, the imbalance problem of the impeller 10 caused by uneven mass distribution is avoided, and the stability and reliability of the impeller in high-speed rotation are improved. Thus, the reliability and stability of the water vapor compressor in operation can be further improved. It can be understood that the improvement of the uniformity of the mass distribution of the impeller 10 can also reduce the working noise and improve the service life of the impeller 10.

[0047] In some embodiments, as Figures 3 to 6As shown, the wall surface of the first hole 1111a and the second hole 1111b is curved, and the orthographic projection of the first hole 1111a and the second hole 1111b on the plane where the first face group 112 is located, the plane where the second face group 113 is located, the plane where the third face group 114 is located, the plane where the fourth face group 115 is located, the plane where the fifth face group 116 is located, and the plane where the sixth face group 117 is located is a circle with equal diameter. In this way, on the one hand, the stress concentration condition in the interior of the lattice unit 111 can be further avoided, thereby facilitating further improvement of the strength and rigidity of the lattice structure 110. On the other hand, the first hole 1111a and the second hole 1111b can form a regular and symmetrical three-dimensional hole network in the interior of the lattice unit 111, thereby further improving the uniformity of the mass distribution of the lattice structure 110, and further facilitating further improvement of the reliability and stability of the water vapor compressor in operation.

[0048] In some embodiments, as shown in Figure 3 and Figure 4 The first face group 112 and the second face group 113 are the same in structure, and both the first face group 112 and the second face group 113 include the first plane 1121, the second plane 1122 and the third plane 1123 which extend along the first direction X in a meandering manner, and the second plane 1122 and the third plane 1123 are located on both sides of the first plane 1121 and are arranged in a central symmetry. When an acting force is applied in a direction perpendicular to the first face group 112 and the second face group 113, the acting force can be transmitted along the first plane 1121, the second plane 1122 and the third plane 1123, and the second plane 1122 and the third plane 1123 are arranged in a central symmetry. In this way, the stress uniformity of the lattice unit 111 can be further improved, thereby facilitating further improvement of the strength and rigidity of the lattice structure 110.

[0049] In some embodiments, as shown in Figure 3 and Figure 5 The third face group 114 and the fourth face group 115 are the same in structure, and the third face group 114 includes the fourth plane 1141, the fifth plane 1142 and the sixth plane 1143 which extend along the second direction Y in a meandering manner, and the fifth plane 1142 and the sixth plane 1143 are located on both sides of the fourth plane 1141 and are arranged in a central symmetry. When an acting force is applied in a direction perpendicular to the third face group 114 and the fourth face group 115, the acting force can be transmitted along the fourth plane 1141, the fifth plane 1142 and the sixth plane 1143, and the fifth plane 1142 and the sixth plane 1143 are arranged in a central symmetry. In this way, the stress uniformity of the lattice unit 111 can be further improved, thereby facilitating further improvement of the strength and rigidity of the lattice structure 110.

[0050] In some embodiments, as shown in Figure 3 and Figure 6As shown, the fifth facet group 116 and the sixth facet group 117 have the same structure. The fifth facet group 116 includes a seventh plane 1161, an eighth plane 1162, and a ninth plane 1163 extending in a Z-direction. The eighth plane 1162 and the ninth plane 1163 are located on both sides of the seventh plane 1161 and are arranged in a centrally symmetrical manner. When a force is applied perpendicular to the direction of the fifth facet group 116 and the sixth facet group 117, the force can be transmitted along the seventh plane 1161, the eighth plane 1162, and the ninth plane 1163, and the eighth plane 1162 and the ninth plane 1163 are arranged in a centrally symmetrical manner. This can further improve the uniformity of force on the lattice unit 111, thereby helping to further improve the strength and stiffness of the lattice structure 110.

[0051] In some embodiments, the thickness of the lattice unit 111 is greater than or equal to 0.8 mm. The thickness of the lattice unit 111 refers to the thickness of the tortuous thin wall forming the lattice unit 111 with holes. Setting the thickness of the lattice unit 111 to be greater than or equal to 0.8 mm is beneficial to further improve the load-bearing capacity of the lattice unit 111, and thus to further improve the strength and stiffness of the lattice structure 110.

[0052] In some embodiments, such as Figure 1 As shown, the plurality of blades 200 includes a plurality of first blades 210 and a plurality of second blades 220. The length of the first blade 210 is greater than the length of the second blade 220, and each second blade 220 is disposed between two adjacent first blades 210.

[0053] In this embodiment, the multiple blades 200 include a plurality of longer first blades 210 and a plurality of shorter second blades 220, which are connected to the base 100 in an alternating arrangement. This arrangement allows the blades 200 of the impeller 10 to more effectively capture and compress gas during compressor operation, and to distribute airflow more evenly during rotation, reducing vibration, noise, and energy loss, thereby improving the compressor's operating efficiency.

[0054] It should be noted that the length of blade 200 can be obtained by solving specific design parameters of blade 200, such as continuity equations and momentum equations, or it can be obtained through some measuring tools. For example, the length of various types of blade 200 can be obtained using simulation analysis software; or, the length of blade 200 can be obtained using tools such as coordinate measuring machines or scanning measuring instruments. This application does not impose any restrictions on this.

[0055] In some embodiments, such as Figure 1 and Figure 7As shown, the blade 200 has a leading edge 201 and a trailing edge 202 opposite to the leading edge 201, and the leading edge 201 of the blade 200 is curved. The leading edge 201 of the blade 200 is the side of the blade 200 close to the center of the impeller 10.

[0056] In this embodiment, the leading edge 201 of the blade 200 of the impeller 10 is curved. In the first aspect, the flow field distribution at the inlet end can be improved, so that the airflow passes through the blade 200 more smoothly, the turbulence and energy loss of the airflow are reduced, and the impact of the airflow on the blade 200 is reduced, thereby improving the fatigue resistance of the blade 200, prolonging the service life of the blade 200, and further improving the stability and reliability of the water vapor compressor. In the second aspect, the vibration and noise of the water vapor compressor can be reduced. In the third aspect, the resistance of the leading edge 201 of the blade 200 to the airflow can be reduced, so that the airflow can utilize energy more efficiently, thereby improving the working efficiency of the water vapor compressor.

[0057] Optionally, in some embodiments, the leading edge 201 of the blade 200 is one of an elliptical surface, a circular arc surface, and a parabolic surface.

[0058] In some embodiments, the impeller 10 is a titanium alloy impeller 10. For example, the impeller 10 can be made of TC11 or TC4 titanium alloy material. In this way, the strength and stiffness of the impeller 10 can be further improved, thereby further improving the stability and reliability of the water vapor compressor.

[0059] The second aspect of the present application provides a water vapor compressor, which comprises a driving shaft (not shown in the figure) and at least one impeller 10 as described in the first aspect, and the impeller 10 is connected to the driving shaft.

[0060] The water vapor compressor of the present application uses the impeller 10 of the first aspect, which can reduce the overall weight of the driving shaft and the impeller 10 while ensuring strength and stiffness, thereby improving the problem of critical speed of the rotor in the working speed range, and further improving the reliability and stability of the water vapor compressor.

[0061] In some embodiments, the impeller 10 is two, and the two impellers 10 are respectively connected to the two ends of the driving shaft. That is, the water vapor compressor of the present embodiment is a two-stage compressor. In this embodiment, the two impellers 10 are respectively installed at the two ends of the driving shaft, and the axial forces of the two impellers 10 can cancel each other out, thereby reducing the axial resultant force acting on the driving shaft, so that the stress of the key supporting components such as bearings can be reduced, and the stability and reliability of the water vapor compressor can be improved.

[0062] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0063] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0064] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0065] In the utility model, the "above", "above" and "above" of the first feature on the second feature can be directly above or obliquely above the first feature on the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature on the second feature can be directly below or obliquely below the first feature on the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0066] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0067] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. An impeller, characterized by, It includes a matrix and multiple blades connected to the matrix. The matrix has a cavity inside, and the cavity is filled with a crystal lattice structure. The lattice structure includes multiple lattice units, each lattice unit having at least one hole. The lattice unit is disposed within a virtual cube, and each lattice unit has a first face group, a second face group, a third face group, a fourth face group, a fifth face group, and a sixth face group that respectively fit with the six faces of the virtual cube. The first face group and the second face group are arranged opposite each other and extend in a zigzag direction, the third face group and the fourth face group are arranged opposite each other and extend in a zigzag direction, and the fifth face group and the sixth face group are arranged opposite each other and extend in a zigzag direction. The first direction, the second direction and the third direction are perpendicular to each other.

2. The impeller of claim 1, wherein The lattice unit is provided with a first hole and a second hole; Both the first hole and the second hole are connected to the first face group, the second face group, the third face group, the fourth face group, the fifth face group, and the sixth face group.

3. The impeller of claim 2, wherein The orthographic projections of the first hole and the second hole onto the plane containing the first face group and the plane containing the second face group are arranged at intervals along the first direction; The orthographic projections of the first hole and the second hole onto the plane containing the third face group and the plane containing the fourth face group are arranged at intervals along the second direction; The first hole and the second hole are arranged at intervals along the third direction on the plane where the fifth face group and the plane where the sixth face group are located.

4. The impeller of claim 2, wherein The walls of both the first hole and the second hole are curved surfaces; The orthographic projections of the first hole and the second hole onto the plane containing the first face group, the plane containing the second face group, the plane containing the third face group, the plane containing the fourth face group, the plane containing the fifth face group, and the plane containing the sixth face group are circles with equal diameters.

5. The impeller of claim 1, wherein The first face group and the second face group have the same structure. Both the first face group and the second face group include a first plane, a second plane and a third plane that extend in a zigzag manner along the first direction. The second plane and the third plane are located on both sides of the first plane and are arranged in a centrally symmetrical manner. And / or, the third face group and the fourth face group have the same structure, and both the third face group and the fourth face group include a fourth plane, a fifth plane and a sixth plane that extend in a zigzag manner along the second direction, and the fifth plane and the sixth plane are located on both sides of the fourth plane and are arranged in a centrally symmetrical manner; And / or, the fifth face group and the sixth face group have the same structure, and both the fifth face group and the sixth face group include a seventh plane, an eighth plane and a ninth plane that extend in a tortuous direction along the third direction. The eighth plane and the ninth plane are located on both sides of the seventh plane and are arranged in a centrally symmetrical manner.

6. The impeller of claim 1, wherein The thickness of the lattice unit is greater than or equal to 0.8 mm.

7. The impeller of any one of claims 1-6, wherein, The lattice unit is a three-period minimal surface lattice unit.

8. The impeller of claim 1, wherein The plurality of blades comprises a plurality of first blades and a plurality of second blades, the length of the first blades is greater than the length of the second blades, and each second blade is arranged between two adjacent first blades.

9. The impeller of claim 1, wherein The blade has a leading edge and a trailing edge opposite to the leading edge, and the leading edge of the blade is curved.

10. The impeller of claim 9, wherein The leading edge of the blade is one of an elliptical surface, a circular arc surface, and a parabolic surface.

11. The impeller of claim 1, wherein The impeller is a titanium alloy impeller.

12. A water vapor compressor characterized by, The impeller comprises a driving shaft and at least one impeller as claimed in any one of claims 1-11, and the impeller is connected to the driving shaft.

13. The water vapor compressor of claim 12, wherein, The impeller comprises two impellers, and the two impellers are respectively connected to two opposite ends of the driving shaft.

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