Impeller assembly, compressor, air compressor and air conditioner

Abstract

The invention discloses an impeller assembly, a compressor, an air compressor and an air conditioner, the impeller assembly comprises a sealing piece and an impeller, the sealing piece is provided with a first sealing surface, a first tooth area is formed on the first sealing surface, and at least one first sealing tooth is arranged in the first tooth area; the impeller rotates relative to the sealing piece, a second sealing face is formed on the impeller, the second sealing face directly faces at least part of the first sealing face, a second tooth area is formed on the second sealing face, and at least one second sealing tooth is arranged in the second tooth area; the first tooth areas and the second tooth areas are arranged in a staggered mode. According to the impeller assembly, efficient sealing is achieved, the manufacturing difficulty and cost are reduced, the ideal throttling effect is achieved, and the stability and reliability of equipment are improved.

Description

Technical Field

[0001] The invention relates to the field of compressors, and in particular to an impeller assembly, a compressor, an air compressor and an air conditioner. Background Art

[0002] In the related technology, although the straight-through labyrinth seal is commonly used, it has a simple structure and limited sealing effect, especially poor performance under harsh working conditions, and it is difficult to meet high-precision requirements. Although the staggered tooth seal improves the tortuosity and sealing effect, it is difficult to manufacture and measure, the cost is high, and the air flow channel is complex, the throttling effect is not ideal, affecting the sealing performance and equipment life. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an impeller assembly. The impeller assembly according to the present invention realizes efficient sealing, reduces manufacturing difficulty and cost, achieves an ideal throttling effect, and improves the stability and reliability of the equipment.

[0004] The present invention also provides a compressor having the impeller assembly.

[0005] The present invention also provides an air compressor having the compressor.

[0006] The present invention also provides an air conditioner having the air compressor.

[0007] The impeller assembly according to the present invention comprises: a seal, wherein the seal is provided with a first sealing surface, wherein the first sealing surface forms a first tooth area, and wherein at least one first sealing tooth is provided in the first tooth area; an impeller, wherein the impeller rotates relative to the seal and wherein the impeller forms a second sealing surface, wherein the second sealing surface is arranged opposite to at least a portion of the first sealing surface, wherein a second tooth area is formed on the second sealing surface, and wherein at least one second sealing tooth is provided in the second tooth area; wherein the first tooth area and the second tooth area are arranged alternately.

[0008] According to the impeller assembly of the present invention, the first tooth area and the second tooth area are staggered and closely matched to form a dynamic labyrinth-like sealing structure. During the rotation of the impeller, there is a small gap between the first sealing tooth and the second sealing surface, and a small gap between the second sealing tooth and the second sealing surface, which helps to prevent gas leakage and further improves the sealing effect by increasing the path length and complexity of the gas flow. The staggered arrangement of the first tooth area and the second tooth area effectively improves the tortuosity and resistance of the sealing path, and significantly reduces the possibility of the airflow directly passing through the sealing gap. At least one first sealing tooth is arranged in the first tooth area, and at least one second sealing tooth is arranged in the second tooth area, forming a complex airflow path, which is more complex and has a better sealing effect than a straight-through labyrinth sealing structure, and is less difficult to manufacture and measure than staggered tooth seals, has lower costs, and has a more ideal throttling effect.

[0009] According to some embodiments of the present invention, at least one of the first tooth area and the second tooth area is configured in plurality, and the first tooth area and the second tooth area are alternately arranged.

[0010] According to some embodiments of the present invention, n first sealing teeth are disposed in each of the first tooth areas, m second sealing teeth are disposed in each of the second tooth areas, and the following conditions are satisfied: 3≤m≤10, 3≤n≤10.

[0011] According to some embodiments of the present invention, the distance between the end of the first sealing tooth and the second sealing surface is d1, and the distance between the end of the second sealing tooth and the first sealing surface is d2; in the adjacent first tooth area and the second tooth area, the distance between the first tooth and the second tooth on the same side end is d3, and satisfies: d1<d3, d2<d3.

[0012] According to some embodiments of the present invention, the impeller includes: an impeller body, the second end face of the impeller body is axially opposite to the first end face of the seal; a rotating shaft, the rotating shaft is connected to the impeller body, and the outer peripheral surface of the rotating shaft is radially opposite to the inner peripheral surface of the seal; wherein the first sealing surface includes the first end face and the inner peripheral surface, and the first end face and / or the outer peripheral surface form the first tooth area; the second sealing surface includes the second end face and the outer peripheral surface, and the second end face and / or the outer peripheral surface form the second tooth area.

[0013] According to some embodiments of the present invention, the distance between the free end of the first sealing tooth on the inner circumferential surface and the outer circumferential surface is r1, which satisfies: d3 / r1≥2.

[0014] In summary, the impeller assembly according to the embodiment of the present invention effectively improves the tortuosity and resistance of the sealing path through the staggered arrangement of the first tooth area and the second tooth area, and significantly reduces the possibility of the airflow directly passing through the sealing gap. At least one first sealing tooth is arranged in the first tooth area, and at least one second sealing tooth is arranged in the second tooth area, forming a complex airflow path, which is more complex and has a better sealing effect than the straight-through labyrinth seal structure, and has lower manufacturing and measurement difficulty, lower cost, and more ideal throttling effect than the staggered tooth seal. By limiting the number of first sealing teeth arranged in each first tooth area to within the range of 3 to 6, and limiting the number of second sealing teeth arranged in each second tooth area to within the range of 3 to 6, a balance between the complexity of the airflow path, the sealing effect, and the manufacturing difficulty and cost is achieved.

[0015] The compressor according to the present invention will be briefly described below.

[0016] The compressor according to the present invention includes the impeller assembly described in any one of the above embodiments. Since the compressor according to the present invention includes the impeller assembly described in any one of the above embodiments, the compressor according to the present invention has high-efficiency sealing, low manufacturing difficulty and cost, and ideal throttling effect, thereby improving the stability and reliability of the equipment.

[0017] The air compressor according to the present invention is briefly described below.

[0018] The air compressor according to the present invention includes the compressor described in any one of the above embodiments. Since the air compressor according to the present invention includes the compressor described in any one of the above embodiments, the air compressor according to the present invention has high efficiency sealing, low cost and excellent throttling performance, which significantly improves the operating stability and reliability of the equipment.

[0019] The air conditioner according to the present invention will be briefly described below.

[0020] The air conditioner according to the present invention includes the compressor described in any one of the above embodiments. Since the air conditioner according to the present invention includes the compressor described in any one of the above embodiments, the air conditioner according to the present invention significantly improves the overall performance and operating efficiency of the air conditioner through the compressor with high efficiency sealing, low manufacturing difficulty and cost, and ideal throttling effect.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic cross-sectional view of an impeller assembly according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] 1. Impeller assembly;

[0026] 11. Seals;

[0027] 1111, a first end surface, 1112, an inner circumferential surface;

[0028] 112, first tooth area, 113, first sealing tooth;

[0029] 12. Impeller;

[0030] 121, second tooth area, 122, second sealing tooth;

[0031] 123. impeller body, 1231. second end surface;

[0032] 124, rotating shaft, 1241, outer peripheral surface; DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] 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", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the related technology, although the straight-through labyrinth seal is commonly used, it has a simple structure and limited sealing effect, especially poor performance under harsh working conditions, and it is difficult to meet high-precision requirements. Although the staggered tooth seal improves the tortuosity and sealing effect, it is difficult to manufacture and measure, the cost is high, and the air flow channel is complex, the throttling effect is not ideal, affecting the sealing performance and equipment life.

[0037] Reference below Figure 1 An impeller assembly 1 according to an embodiment of the present invention is described.

[0038] like Figure 1 As shown, the impeller assembly 1 according to the present invention includes a seal 11, which is used to prevent gas leakage from a high-pressure area to a low-pressure area, thereby reducing the amount of gas leakage. The seal 11 is provided with a first sealing surface, and the first sealing surface is formed with a first tooth area 112. At least one first sealing tooth 113 is provided in the first tooth area 112. The first sealing tooth 113 can effectively capture and guide the airflow, reduce the possibility of the airflow directly passing through the sealing gap, and improve the sealing efficiency by increasing the tortuosity and resistance of the airflow path.

[0039] The impeller assembly 1 also includes an impeller 12, which rotates relative to the seal 11. Therefore, during the operation of the impeller assembly 1, the impeller 12 and the seal 11 rotate relative to each other. The impeller 12 is formed with a second sealing surface, which is arranged opposite to at least part of the first sealing surface. There is a sealing gap between the second sealing surface and the first sealing surface. The sealing gap is used to hinder the flow of airflow, and when the impeller 12 and the seal 11 rotate relative to each other, the seal 11 and the impeller 12 will not contact each other and cause wear. A second tooth area 121 is formed on the second sealing surface, and at least one second sealing tooth 122 is arranged in the second tooth area 121, thereby increasing the complexity of the seal, further reducing the possibility of the airflow directly passing through the sealing gap, and improving the sealing efficiency by increasing the tortuosity and resistance of the airflow path.

[0040] The first tooth area 112 and the second tooth area 121 are staggered. The first tooth area 112 and the second tooth area 121 are staggered and closely matched to form a dynamic labyrinth-like sealing structure. During the rotation of the impeller 12, there is a small gap between the first sealing tooth 113 and the second sealing surface, and there is a small gap between the second sealing tooth 122 and the second sealing surface, which helps to reduce gas leakage and further improves the sealing effect by increasing the path length and complexity of the gas flow.

[0041] The staggered arrangement of the first tooth area 112 and the second tooth area 121 effectively improves the tortuosity and resistance of the sealing path, significantly reducing the possibility of airflow directly passing through the sealing gap. At least one first sealing tooth 113 is arranged in the first tooth area 112, and at least one second sealing tooth 122 is arranged in the second tooth area 121, forming a complex airflow path, which is more complex and has a better sealing effect than a straight-through labyrinth seal structure, and is less difficult to manufacture and measure, has a lower cost, and has a more ideal throttling effect than a staggered tooth seal.

[0042] Therefore, the impeller assembly 1 according to the present invention realizes efficient sealing, reduces manufacturing difficulty and cost, achieves an ideal throttling effect, and improves the stability and reliability of the equipment.

[0043] According to some embodiments of the present invention, Figure 1 As shown, at least one of the first tooth area 112 and the second tooth area 121 is configured as a plurality of teeth, which can further enhance the sealing effect. By increasing the number and complexity of the first tooth area 112 and / or the second tooth area 121, the direct passage of the airflow can be more effectively blocked, thereby improving the reliability and durability of the seal. The first tooth area 112 and the second tooth area 121 are alternately arranged, and the alternating arrangement helps to form a more complex airflow path, further increasing the difficulty of the airflow passing through the sealing gap, thereby improving the sealing performance.

[0044] According to some embodiments of the present invention, Figure 1 As shown, n first sealing teeth 113 are disposed in each first tooth area 112 , m second sealing teeth 122 are disposed in each second tooth area 121 , and the following conditions are satisfied: 3≤m≤10, 3≤n≤10.

[0045] If the number of first sealing teeth 113 or second sealing teeth 122 provided in each first tooth area 112 or second tooth area 121 is small, the number of first tooth areas 112 and second tooth areas 121 can be increased, thereby increasing the complexity of the airflow path and enhancing the sealing effect, but the manufacturing difficulty and cost are higher.

[0046] If a large number of first sealing teeth 113 or second sealing teeth 122 are provided in each first tooth area 112 or second tooth area 121, the number of first tooth areas 112 and second tooth areas 121 needs to be reduced accordingly, which reduces the manufacturing difficulty and cost, but reduces the complexity of the airflow path, thereby reducing the sealing effect.

[0047] By limiting the number of first sealing teeth 113 provided in each first tooth area 112 within the range of 3 to 10, and limiting the number of second sealing teeth 122 provided in each second tooth area 121 within the range of 3 to 10, a balance is achieved between the complexity of the airflow path, the sealing effect, and the manufacturing difficulty and cost.

[0048] According to some embodiments of the present invention, the distance between the end of the first sealing tooth 113 and the second sealing surface is d1, so there is a certain distance between the end of each first sealing tooth 113 and the second sealing surface, which is necessary to ensure that when the impeller 12 rotates, there is no wear between the first sealing tooth 113 and the second sealing surface due to direct contact, and it is small enough to effectively prevent gas leakage.

[0049] Similarly, the distance between the end of the second sealing tooth 122 and the first sealing surface is d2, so there is a certain distance between the end of each second sealing tooth 122 and the first sealing surface, which is necessary to ensure that when the impeller 12 rotates, there is no wear between the second sealing tooth 122 and the first sealing surface due to direct contact, and it is small enough to effectively prevent gas leakage.

[0050] In the adjacent first tooth area 112 and the second tooth area 121, the distance between the first tooth and the second tooth on the same side end (for example, from one end of the air flow inlet to the air flow outlet, or from the air flow outlet to the other end of the air flow inlet) is d3, which is required to ensure that when the impeller 12 rotates, unnecessary friction and wear will not be generated between the first sealing teeth 113 and the second sealing teeth 122 due to being too close, thereby affecting the service life of the impeller assembly 1; and to ensure that the first sealing teeth 113 and the second sealing teeth 122 are compact enough to limit the air flow from directly passing through these gaps, thereby effectively reducing the gas leakage and maintaining good sealing performance.

[0051] d1, d2 and d3 satisfy: d1<d3, d2<d3. Compared with the spacing between the adjacent first sealing teeth 113 and the second sealing teeth 122, the airflow path area covered by the spacing between the end of the first sealing tooth 113 and the second sealing surface and the spacing between the end of the second sealing tooth 122 and the first sealing surface is larger, so d1 and d2 have a greater impact on the sealing performance. Therefore, relatively small d1 and d2 help reduce gas leakage and improve the tightness and efficiency of the seal. A larger d3 provides more space to accommodate minor deformations that may occur due to thermal expansion or manufacturing and assembly errors, thereby enhancing the stability and reliability of the sealing structure and facilitating assembly.

[0052] According to some embodiments of the present invention, Figure 1 As shown, the impeller 12 includes an impeller body 123, and the second end face 1231 of the impeller body 123 is axially opposite to the first end face 1111 of the seal 11, so that the first end face 1111 and the second end face 1231 are close to each other, thereby forming a seal.

[0053] The impeller 12 further includes a rotating shaft 124, which is connected to the impeller body 123 to drive the impeller body 123 to rotate. The outer circumferential surface 1241 of the rotating shaft 124 and the inner circumferential surface 1112 of the seal 11 are arranged opposite to each other in the radial direction, and there is a sealing gap between the outer circumferential surface 1241 of the rotating shaft 124 and the inner circumferential surface 1112 of the seal 11, and the sealing gap is used to hinder the flow of airflow, and when the rotating shaft 124 drives the impeller body 123 to rotate, the seal 11 and the impeller 12 will not contact each other to cause wear.

[0054] The first sealing surface includes a first end surface 1111 and an inner circumferential surface 1112. The first end surface 1111 and / or the inner circumferential surface 1112 form a first tooth area 112, so the first sealing tooth 113 can be formed on the first end surface 1111, or on the inner circumferential surface 1112, or both. The second sealing surface includes a second end surface 1231 and an outer circumferential surface 1241. The second end surface 1231 and / or the outer circumferential surface 1241 form a second tooth area 121, so the second sealing tooth 122 can be formed on the second end surface 1231, or on the outer circumferential surface 1241, or both. By arranging the first sealing tooth 113 and the second sealing tooth 122 at different positions on the airflow path, the sealing effect can be further optimized.

[0055] More specifically, if the inner circumferential surface 1112 is provided with the first sealing teeth 113, the outer circumferential surface 1241 may be provided with the second sealing teeth 122 or may not be provided with the second sealing teeth 122; if the outer circumferential surface 1241 is provided with the second sealing teeth 122, the inner circumferential surface 1112 may be provided with the first sealing teeth 113 or may not be provided with the first sealing teeth 113, thereby increasing the complexity of the airflow path and improving the sealing performance. It is understood that the above is only an explanation of the embodiment of the present invention and does not constitute a limitation of the embodiment of the present invention.

[0056] According to some embodiments of the present invention, Figure 1 As shown, the distance between the free end of the first sealing tooth 113 of the inner circumferential surface 1112 and the outer circumferential surface 1241 is r1, so there is a certain distance between the first sealing tooth 113 and the outer circumferential surface 1241 to ensure that when the shaft 124 rotates, there is no wear between the first sealing tooth 113 and the outer circumferential surface 1241 due to direct contact.

[0057] r1 and d3 satisfy: d3 / r1≥2. Compared with the spacing between the adjacent first sealing teeth 113 and the second sealing teeth 122 in the adjacent first tooth area 112 and the second tooth area 121, the spacing between the first sealing tooth 113 and the outer peripheral surface 1241 is smaller. On the one hand, it can ensure that there is enough space between the first sealing tooth 113 and the outer peripheral surface 1241 during the rotation of the shaft 124 to avoid direct contact and wear, and further optimize the airflow path. The smaller r1 value forces the airflow to go through a more tortuous path when passing through the sealing gap, increasing the resistance and complexity of the flow, thereby more effectively hindering gas leakage. The larger d3 provides more space to accommodate minor deformations that may occur due to thermal expansion or manufacturing and assembly errors, thereby enhancing the stability and reliability of the sealing structure and facilitating assembly.

[0058] The compressor according to the present invention will be briefly described below.

[0059] The compressor according to the present invention includes the impeller assembly 1 in any one of the above embodiments. Since the compressor according to the present invention includes the impeller assembly 1 in any one of the above embodiments, the compressor according to the present invention has high-efficiency sealing, low manufacturing difficulty and cost, and ideal throttling effect, thereby improving the stability and reliability of the equipment.

[0060] The air compressor according to the present invention is briefly described below.

[0061] The air compressor according to the present invention includes the compressor in any one of the above embodiments. Since the air compressor according to the present invention includes the compressor in any one of the above embodiments, the air compressor according to the present invention has high efficiency sealing, low cost and excellent throttling performance, which significantly improves the operating stability and reliability of the equipment.

[0062] The air conditioner according to the present invention will be briefly described below.

[0063] The air conditioner according to the present invention includes the compressor in any one of the above embodiments. Since the air conditioner according to the present invention includes the compressor in any one of the above embodiments, the air conditioner according to the present invention significantly improves the overall performance and operating efficiency of the air conditioner through the compressor with high efficiency sealing, low manufacturing difficulty and cost, and ideal throttling effect.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means 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 representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0065] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An impeller assembly, characterized in that: include: A sealing element (11), wherein the sealing element (11) is provided with a first sealing surface, wherein the first sealing surface forms a first tooth area (112), and at least one first sealing tooth (113) is provided in the first tooth area (112); An impeller (12), the impeller (12) rotates relative to the sealing element (11) and the impeller (12) forms a second sealing surface, the second sealing surface is arranged opposite to at least a portion of the first sealing surface, a second tooth area (121) is formed on the second sealing surface, and at least one second sealing tooth (122) is arranged in the second tooth area (121); wherein The first tooth area (112) and the second tooth area (121) are arranged alternately.

2. The impeller assembly according to claim 1, characterized in that: At least one of the first tooth section (112) and the second tooth section (121) is constructed as a plurality of teeth, and the first tooth section (112) and the second tooth section (121) are alternately arranged.

3. The impeller assembly according to claim 2, characterized in that: Each of the first tooth areas (112) is provided with n first sealing teeth (113), each of the second tooth areas (121) is provided with m second sealing teeth (122), and the following conditions are satisfied: 3≤m≤10, 3≤n≤10.

4. The impeller assembly according to claim 2, characterized in that: The distance between the end of the first sealing tooth (113) and the second sealing surface is d1, and the distance between the end of the second sealing tooth (122) and the first sealing surface is d2; in the adjacent first tooth area (112) and the second tooth area (121), the distance between the first tooth and the second tooth at the same side end is d3, and the following conditions are satisfied: d1<d3, d2<d3.

5. The impeller assembly according to claim 4, characterized in that: The impeller (12) comprises: An impeller body (123), wherein a second end surface (1231) of the impeller body (123) and a first end surface (1111) of the sealing element (11) are arranged opposite to each other in the axial direction; A rotating shaft (124), the rotating shaft (124) being connected to the impeller body (123), the outer peripheral surface (1241) of the rotating shaft (124) and the inner peripheral surface (1112) of the sealing element (11) being arranged opposite to each other in the radial direction; The first sealing surface comprises the first end surface (1111) and the inner peripheral surface (1112), and the first end surface (1111) and / or the inner peripheral surface (1112) form the first tooth area (112); The second sealing surface includes the second end surface (1231) and the outer peripheral surface (1241), and the second end surface (1231) and / or the outer peripheral surface (1241) are formed with the second tooth area (121).

6. The impeller assembly according to claim 5, characterized in that: The distance between the free end of the first sealing tooth (113) of the inner peripheral surface (1112) and the outer peripheral surface (1241) is r1, which satisfies: d3 / r1≥2.

7. A compressor, characterized in that: The impeller assembly comprises the impeller assembly according to any one of claims 1 to 6.

8. An air compressor, characterized in that: Comprising the compressor as claimed in claim 7.

9. An air conditioner, characterized in that: Comprising the compressor as claimed in claim 7.

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