Centrifugal machine assembly, compressor and air conditioner

Abstract

The utility model discloses a centrifugal machine assembly, a compressor and an air conditioner. The centrifugal machine assembly comprises a shell, a rotating shaft and an impeller, the shell is provided with a first wall and a second wall, and a through pivoting hole is formed in the shell to connect the first wall with the second wall; the rotating shaft penetrates through the pivoting hole, and a third wall right opposite to the second wall is formed on the rotating shaft; the impeller is connected with the rotating shaft and located on one side of the shell. A fourth wall is formed on the surface, facing the first wall, of the impeller. At least one of the first wall and the fourth wall is provided with a first sealing piece, and the first sealing piece is suitable for sealing a first gap between the first wall and the fourth wall; at least one of the second wall and the third wall is provided with a second sealing piece, and the second sealing piece is suitable for sealing a second gap between the second wall and the third wall. According to the centrifugal machine assembly, through the cooperation of the first sealing piece and the second sealing piece and the dynamic complementation between the first gap and the second gap, the gas leakage loss of the centrifugal machine assembly is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, in particular to a centrifuge component, a compressor and an air conditioner. Background Art

[0002] Centrifuges are widely used in the industrial field, mainly in high-speed rotating machines such as centrifugal refrigeration compressors, air compressors, and blowers. The common feature of these is that the impeller rotates at high speed to centrifugally compress the gas. While the impeller is compressing, due to the gap between the rotor and the stator, the gas in the impeller compressor will leak along the rotor and the stator, causing leakage losses and low efficiency of the compressor. For example, when an existing centrifuge is working, a portion of the gas will flow into the electric shock cavity from the gap between the rotor and the sealing structure of the centrifuge impeller, causing leakage losses. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a centrifuge assembly. According to the centrifuge assembly of the utility model, the gas flow in the first gap and the second gap is respectively limited by the first seal and the second seal to reduce gas leakage. At the same time, the dynamic complementarity between the first gap and the second gap can reduce the amount of gas that finally enters the motor cavity, thereby reducing the gas leakage loss of the centrifuge assembly and improving the efficiency of the centrifuge assembly.

[0004] The utility model also provides a compressor comprising the centrifuge assembly.

[0005] The utility model also provides an air conditioner comprising the compressor.

[0006] According to the utility model, a centrifuge assembly includes a shell, a rotating shaft and an impeller, wherein the shell has a first wall and a second wall, and a through pivot hole is formed on the shell to connect the first wall with the second wall; the rotating shaft passes through the pivot hole, and a third wall directly opposite to the second wall is formed on the rotating shaft; the impeller is connected to the rotating shaft and is located on one side of the shell, and a fourth wall is formed on the surface of the impeller facing the first wall; wherein at least one of the first wall and the fourth wall is provided with a first seal, and the first seal is suitable for sealing a first gap between the first wall and the fourth wall; at least one of the second wall and the third wall is provided with a second seal, and the second seal is suitable for sealing a second gap between the second wall and the third wall.

[0007] According to the centrifuge assembly of the utility model, by arranging a first seal between the first wall and the fourth wall, and arranging a second seal between the second wall and the third wall, the first gap and the second gap in the centrifuge assembly can be effectively reduced, thereby reducing the leakage loss of the gas during high-speed rotation. At the same time, the arrangement of the first seal and the second seal can also change the shape of the first gap and the second gap, extend the flow path of the gas, and also cause certain obstacles to the flow of the gas, reduce the flow rate of the gas, and ultimately reduce the leakage of the gas, thereby improving the efficiency of the centrifuge assembly.

[0008] According to one embodiment of the utility model, the first sealing member includes a first sealing tooth and a second sealing tooth, wherein the first sealing tooth is formed on the first wall and is configured as a plurality of teeth spaced apart in the extension direction of the first wall; the second sealing tooth is formed on the fourth wall and is configured as a plurality of teeth spaced apart in the extension direction of the fourth wall; wherein the first sealing tooth is arranged between two adjacent second sealing teeth.

[0009] According to an embodiment of the present invention, the second sealing member is configured as a third sealing tooth, and the third sealing tooth is configured as a plurality of third sealing teeth spaced apart in the extension direction of the second wall and / or the third sealing tooth is configured as a plurality of third sealing teeth spaced apart on the third wall.

[0010] According to an embodiment of the present utility model, the first wall is parallel to the second wall and after the gap between the first sealing tooth and the second sealing tooth increases, the gap between the second wall and the third wall decreases.

[0011] According to an embodiment of the present invention, the distance between the end of the first sealing tooth and the fourth wall is d1, the distance between the end of the second sealing tooth and the first wall is d2, and the following condition is satisfied: d1 = d2 ≥ 0.2 mm.

[0012] According to an embodiment of the present invention, a gap between the first sealing tooth and the second sealing tooth in the extension direction of the first gap is d3, and satisfies: d3≥0.1 mm.

[0013] According to an embodiment of the present utility model, a fourth sealing tooth is formed on the inner wall of the pivot hole, and the fourth sealing tooth is configured as a plurality of teeth spaced apart in the axial direction.

[0014] According to an embodiment of the present utility model, the distance between the end of the third sealing tooth and the third wall is d4, and satisfies: d4≥0.1 mm.

[0015] According to one embodiment of the utility model, the shell includes a shell body and a sealing component, and a first hole is formed on the shell body; the sealing component is accommodated in the first hole and the first wall and the second wall are respectively formed on both sides of the sealing component in the thickness direction, and the pivot hole suitable for the rotating shaft to pass through is formed on the sealing component.

[0016] According to one embodiment of the utility model, the rotating shaft includes a rotating shaft body and a thrust plate, the rotating shaft body passes through the pivot hole and is connected to the impeller; the thrust plate is sleeved on the outer periphery of the rotating shaft body, and the third wall is formed on the side of the thrust plate facing the sealing component.

[0017] According to an embodiment of the utility model, a receiving groove for accommodating the thrust plate is formed on the housing body and / or the sealing component.

[0018] The compressor of the present utility model is briefly described below.

[0019] The compressor according to the utility model includes the centrifuge assembly in the above embodiment. Since the compressor according to the utility model is provided with the centrifuge assembly in the above embodiment, when the centrifuge assembly is assembled, the setting of the first seal and the second seal reduces the gas leakage loss of the centrifuge assembly, thereby improving the efficiency of the compressor.

[0020] The air conditioner according to the utility model is briefly described below.

[0021] The air conditioner according to the utility model includes the compressor in the above embodiment. Since the air conditioner according to the utility model is provided with the compressor in the above embodiment, when the compressor is assembled to the air conditioner, the efficiency of the air conditioner in regulating the temperature can be improved.

[0022] In summary, a sealing component is provided in a shell of a centrifuge assembly, and a first wall and a second wall parallel to each other and a pivot hole penetrating the sealing component and connecting the first wall with the second wall are formed on the sealing component, and a rotating shaft can rotatably pass through the pivot hole and be connected to an impeller, and a fourth wall corresponding to the first wall is formed on the impeller, and a first gap is defined between the fourth wall and the first wall, and at the same time, a first sealing tooth protruding toward the fourth wall is provided on the first wall, and a second sealing tooth protruding toward the first wall is provided on the fourth wall, and the first sealing tooth protruding toward the first wall is provided on the fourth wall, and the first sealing tooth cooperates with the second sealing tooth to change the gas flow path in the first gap and hinder the flow of the gas, and can reduce the width of the first gap to reduce the amount of gas passing through the first gap, thereby reducing the gas leakage loss of the centrifuge assembly. A thrust plate is also provided on the rotating shaft, and a third wall opposite to the second wall is formed on at least part of the outer periphery of the thrust plate, a second gap is formed between the second wall and the third wall, and a third sealing tooth protruding toward the third wall is provided on the second wall; similarly, a third gap is defined between the inner wall of the pivot hole and the rotating shaft, and a fourth sealing tooth protruding toward the rotating shaft is formed on the inner wall of the pivot hole. The third sealing tooth and the fourth sealing tooth can respectively change the flow path of the gas in the second gap and the third gap and hinder the gas in the corresponding gaps. When the impeller rotates, a part of the gas flows into the motor cavity after passing through the first gap, the third gap and the second gap in sequence, causing leakage loss, and the above-mentioned four types of sealing teeth can reduce such leakage loss, and there is a dynamic complementary relationship between the first gap and the second gap, which can further reduce the gas that finally enters the motor cavity, reduce gas leakage, and improve the efficiency of the centrifuge assembly.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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:

[0025] Figure 1 is a structural diagram of a centrifuge assembly according to an embodiment of the utility model;

[0026] Figure 2 is a schematic diagram of a centrifuge assembly according to an embodiment of the utility model;

[0027] Figure 3 is based on Figure 2 The middle circle shows a partial enlarged view of A;

[0028] Figure 4 is a schematic diagram of a first gap according to an embodiment of the utility model;

[0029] Figure 5 It is a schematic diagram of a second gap according to an embodiment of the utility model.

[0030] Reference numerals:

[0031] Centrifuge assembly 1;

[0032] The housing 11, the first wall 111, the second wall 112, the housing body 113, the receiving groove 1131, and the sealing component 114;

[0033] The rotating shaft 12, the third wall 121, the rotating shaft body 122, and the thrust plate 123;

[0034] Impeller 13, fourth wall 131;

[0035] A first sealing member 14, a first sealing tooth 141, and a second sealing tooth 142;

[0036] A third sealing tooth 15 and a fourth sealing tooth 16;

[0037] A first gap 101 , a second gap 102 , a third gap 103 , and a bushing 104 . DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] Centrifuges are widely used in the industrial field, mainly in high-speed rotating machines such as centrifugal refrigeration compressors, air compressors, and blowers. The common feature of these is that the impeller rotates at high speed to centrifugally compress the gas. While the impeller is compressing, due to the gap between the rotor and the stator, the gas in the impeller compressor will leak along the rotor and the stator, causing leakage losses and low efficiency of the compressor. For example, when the existing centrifuge is working, a part of the gas will flow into the electric shock cavity from the gap between the rotor and the wheel seal structure of the centrifuge impeller, causing leakage losses.

[0040] Reference below Figure 1-Figure 5 A centrifuge assembly according to an embodiment of the present invention is described.

[0041] According to the utility model, a centrifuge assembly 1 includes a housing 11, a rotating shaft 12 and an impeller 13. The housing 11 has a first wall 111 and a second wall 112. A through pivot hole is formed on the housing 11 to connect the first wall 111 with the second wall 112. The rotating shaft 12 passes through the pivot hole. A third wall 121 is formed on the rotating shaft 12 and is directly opposite to the second wall 112. The impeller 13 is connected to the rotating shaft 12 and is located on one side of the housing 11. A fourth wall 131 is formed on the surface of the impeller 13 facing the first wall 111. At least one of the first wall 111 and the fourth wall 131 is provided with a first seal 14, and the first seal 14 is suitable for sealing a first gap 101 between the first wall 111 and the fourth wall 131. At least one of the second wall 112 and the third wall 121 is provided with a second seal, and the second seal is suitable for sealing a second gap 102 between the second wall 112 and the third wall 121.

[0042] According to the centrifuge assembly 1 of the present invention, a first wall 111 and a second wall 112 are defined in the housing 11. Figure 1 As shown, it can be understood that a structure protruding toward the inside of the housing 11 is formed on the housing 11, and the two side surfaces of the structure facing away from each other form a first wall 111 and a second wall 112 respectively. The first wall 111 is formed with a cavity for assembling the impeller 13 on the side facing away from the second wall 112, and the second wall 112 is formed with a cavity for assembling the shaft 12 on the side facing away from the first wall 111, and the cavity is connected to the motor cavity. A pivot hole is provided inside the housing 11, and the setting of the pivot hole makes the cavity on the first wall 111 communicate with the cavity on the second wall 112. During assembly, one end of the shaft 12 can pass through the pivot hole and connect with the impeller 13 so that the shaft 12 drives the impeller 13 to rotate. The setting of the pivot hole reserves space for the rotation of the shaft 12. At the same time, fixing the shaft 12 to the pivot hole can reduce the shaking amplitude of the shaft 12 when rotating, improve the stability of the shaft 12 driving the impeller 13 to rotate, and thus improve the efficiency of the centrifuge.

[0043] A third wall 121 corresponding to the second wall 112 is formed on the rotating shaft 12. Similarly, a fourth wall 131 opposite to the first wall 111 is formed on the surface of the impeller 13 facing the first wall 111. A first gap 101 is formed between the first wall 111 and the fourth wall 131, and a second gap 102 is formed between the second wall 112 and the third wall 121. When the centrifuge is working, the impeller 13 rotates, and the gas will flow from the position of the impeller 13 through the first gap 101 and the second gap 102 in sequence and then flow into the motor cavity, causing leakage loss. Therefore, it is necessary to make a reasonable layout and design in the first gap 101 and the second gap 102 to reduce gas leakage. Specifically, a first seal 14 is provided between the first wall 111 and the fourth wall 131, wherein the first seal 14 can be provided on the first wall 111, or on the fourth wall 131, or both the first wall 111 and the fourth wall 131 are provided with the first seal 14, and the first seal 14 can change the length, width and shape of the first gap 101. For example, after the first seal 14 is provided in the first gap 101, the first seal 14 can reduce the width of the first gap 101, that is, reduce the gap between the first wall 111 and the fourth wall 131, so as to reduce the gas flowing out of the first gap 101, reduce the gas leakage loss of the centrifuge, and improve the efficiency of the centrifuge. Similarly, a second seal is provided between the second wall 112 and the third wall 121, wherein the second seal can be provided on the second wall 112, or on the third wall 121, or both the second wall 112 and the third wall 121 are provided with the second seal, and the second seal can change the length, width and shape of the second gap 102. For example, after the second seal is arranged in the second gap 102, the second seal can reduce the width of the second gap 102, that is, reduce the gap between the second wall 112 and the third wall 121, so as to reduce the gas flowing out of the second gap 102, reduce the gas leakage loss of the centrifuge, and improve the efficiency of the centrifuge.

[0044] like Figure 1 to Figure 3As shown, since the first wall 111 and the second wall 112 are located on different sides of the same structure in the same direction on the housing 11, there is a complementary relationship between the first gap 101 and the second gap 102. Specifically, when the first seal 14 and the second seal are respectively provided in the first gap 101 and the second gap 102, the first seal 14 and the second seal can respectively reduce the width of the first gap 101 and the second gap 102, reduce the gas content passing through the first gap 101 and the second gap 102, and thus reduce the gas leakage loss of the centrifuge assembly 1. The complementary relationship between the first gap 101 and the second gap 102 can be simply understood as follows: during the operation of the centrifuge assembly 1, the shaft 12 drives the impeller 13 to rotate, and the shaft 12 will shake when rotating. When the shaft 12 drives the impeller 13 to move in a direction away from the first wall 111, the moving direction here can be simply understood as the left direction shown in FIG. 2. At this time, the first gap 101 becomes larger, but the second gap 102 becomes smaller. Although more gas passes through the first gap 101, the flow path of the gas passes through the first gap 101 and the second gap 102 in sequence. Therefore, the flow of gas at the second gap 102 is restricted, and the gas flow is not as large as that of the first gap 101. The gas that eventually enters the motor cavity is also reduced, which can effectively reduce the gas leakage loss of the centrifuge assembly 1; similarly, when the rotating shaft 12 drives the impeller 13 to move in the direction away from the second wall 112, the moving direction here can be simply understood as the right side shown in Figure 2. At this time, the second gap 102 becomes larger, but the first gap 101 becomes smaller. Since the flow path of the gas passes through the first gap 101 and the second gap 102 in sequence, the gas flowing to the second gap 102 is reduced due to the restriction of the first gap 101. Therefore, the gas that eventually enters the motor cavity is also reduced, which can effectively reduce the gas leakage loss of the centrifuge assembly 1.

[0045] In summary, the centrifuge assembly 1 can effectively reduce the first gap 101 and the second gap 102 in the centrifuge assembly 1 by arranging the first seal 14 between the first wall 111 and the fourth wall 131, and arranging the second seal between the second wall 112 and the third wall 121, thereby reducing the leakage loss of the gas during high-speed rotation. At the same time, the arrangement of the first seal 14 and the second seal can also change the shape of the first gap 101 and the second gap 102, extend the flow path of the gas, and cause certain obstacles to the flow of the gas, thereby reducing the flow rate of the gas, and ultimately reducing the leakage of the gas, thereby improving the efficiency of the centrifuge assembly 1.

[0046] The fourth wall 131 on the impeller 13 is opposite to the first wall 111 of the housing 11 to form a first gap 101, and a first seal 14 is arranged in the first gap 101. At the same time, the third wall 121 on the rotating shaft 12 is opposite to the second wall 112 of the housing 11 to form a second gap 102, and a second seal is arranged in the second gap 102. Such a structural design ensures the compactness of the centrifuge assembly 1 and can improve the stability and reliability of the centrifuge assembly 1.

[0047] According to one embodiment of the utility model, the first sealing member 14 includes a first sealing tooth 141 and a second sealing tooth 142, wherein the first sealing tooth 141 is formed on the first wall 111 and is configured as a plurality of teeth spaced apart in the extension direction of the first wall 111; the second sealing tooth 142 is formed on the fourth wall 131 and is configured as a plurality of teeth spaced apart in the extension direction of the fourth wall 131; wherein the first sealing tooth 141 is disposed between two adjacent second sealing teeth 142.

[0048] The first seal 14 is the main structure that affects the flow of gas in the first air gap. Specifically, the first seal 14 includes a first sealing tooth 141 and a second sealing tooth 142 respectively arranged on the first wall 111 and the fourth wall 131. The first sealing tooth 141 and the second sealing tooth 142 are both constructed as a plurality of teeth protruding toward each other and staggered with each other in the extension direction of the first air gap. It can also be understood that the first sealing tooth 141 is arranged between two adjacent second sealing teeth 142, and the plurality of first sealing teeth 141 and the plurality of second sealing teeth 142 form a meshing relationship, and the gas can flow through the gap between the first sealing teeth 141 and the second sealing teeth 142. The first sealing teeth 141 and the second sealing teeth 142 cooperate with each other to change the flow path of the gas in the first gap 101, reduce the width of the first gap 101, and prolong the flow time of the gas in the first gap 101. The first sealing teeth 141 and the second sealing teeth 142 can also hinder the flow of the gas, reduce the circulation speed of the gas, thereby reducing the leakage loss of the gas through the first gap 101, and can improve the efficiency of the centrifuge assembly 1.

[0049] According to an embodiment of the present invention, the second sealing member is configured as a third sealing tooth 15 , and the third sealing tooth 15 is configured as a plurality of third sealing teeth 15 spaced apart in the extension direction of the second wall 112 and / or a plurality of third sealing teeth 15 spaced apart on the third wall 121 .

[0050] The second seal is the main structure that affects the gas flow in the second air gap. Specifically, the second seal is constructed as a plurality of third sealing teeth 15. The plurality of third sealing teeth 15 can be arranged at intervals in the extension direction of the second wall 112; the plurality of third sealing teeth 15 can also be arranged at intervals in the extension direction of the third wall 121; or the second wall 112 and the third wall 121 are both provided with a plurality of third sealing teeth 15, and the third sealing teeth 15 on the second wall 112 and the third sealing teeth 15 on the third wall 121 are staggered in the extension direction of the second gap 102. The arrangement of the third sealing teeth 15 can be selected according to actual conditions. For example, when a plurality of third sealing teeth 15 are arranged on the second wall 112, the third sealing teeth 15 protrude toward the third wall 121. The protruding third sealing teeth 15 can reduce the width of the second gap 102 and change the shape of the second gap 102 to extend the path and time for the gas to pass through the second gap 102. At the same time, the third sealing teeth 15 can also produce a certain obstruction to the flow of gas, ultimately reducing the amount of gas passing through the second gap 102, which can effectively reduce the leakage loss of gas entering the motor cavity when the centrifuge assembly 1 is working.

[0051] According to an embodiment of the present invention, the first wall 111 is parallel to the second wall 112 and after the gap between the first sealing teeth 141 and the second sealing teeth 142 increases, the gap between the second wall 112 and the third wall 121 decreases.

[0052] The first wall 111 is parallel to the second wall 112, so that there is a certain complementary dynamic relationship between the first gap 101 and the second gap 102. The complementary relationship here can be simply understood as when the first gap 101 decreases, the second gap 102 may increase. Figure 2 and Figure 3 As shown, when the rotating shaft 12 and the impeller 13 and other structures move in the axial direction, the first gap 101 will increase or decrease with the movement of the rotating shaft 12 and the impeller 13, and correspondingly, the second gap 102 will decrease or increase with the movement of the rotating shaft 12 and the impeller 13. The dynamic relationship between the first gap 101 and the second gap 102 makes at least one of the first gap 101 and the second gap 102 decrease when the rotating shaft 12 and the impeller 13 move, which can ensure that the flow rate of the gas is reduced in the entire path entering the motor cavity. Therefore, the gas leakage of the centrifuge assembly 1 is reduced as a whole, and the gas leakage loss of the centrifuge assembly 1 can be reduced.

[0053] According to an embodiment of the present invention, the distance between the end of the first sealing tooth 141 and the fourth wall 131 is d1, the distance between the end of the second sealing tooth 142 and the first wall 111 is d2, and d1=d2≥0.2 mm is satisfied.

[0054] The first sealing teeth 141 are arranged on the first wall 111 and protrude toward the fourth wall 131. The protruding first sealing teeth 141 can reduce the width of the first gap 101; the second sealing teeth 142 are arranged on the fourth wall 131 and protrude toward the first wall 111. Similarly, the second sealing teeth 142 can also reduce the width of the first gap 101. At the same time, the first sealing teeth 141 and the second sealing teeth 142 are staggered in the extension direction of the first gap 101. Therefore, the first sealing teeth 141 and the second sealing teeth 142 cooperate with each other to reduce the width of the first gap 101 while allowing the gas to have multiple turning areas on the flow path of the first gap 101, thereby reducing the gas passing through the first gap 101 and reducing the flow rate of the gas in the first gap 101, which can effectively reduce the leakage loss of the gas of the centrifuge assembly 1 entering the motor cavity.

[0055] like Figure 4 As shown, the distance from the end of the first sealing tooth 141 to the fourth wall 131 is d1, and the distance from the end of the second sealing tooth 142 to the first wall 111 is d2. In actual processing, d1 and d2 can usually take the same value, that is, it can be simply understood that the distance from the first sealing tooth 141 to the fourth wall 131 is equal to the distance from the second sealing tooth 142 to the first wall 111. Since the value range of d1 and d2 will affect the width of the first gap 101, the values ​​of d1 and d2 should not be too large or too small. Specifically, when d1 or d2 is too small, for example, when d1=d2<0.2mm, the size of the first gap 101 is too small, the impeller 13 and the housing 11 are too tightly matched, which may affect the rotation of the impeller 13; on the contrary, when the values ​​of d1 and d2 are too large, the width of the first gap 101 will be too large, the gas flow rate of gas entering the first gap 101 will increase, and the gas leakage loss of the centrifuge assembly 1 may increase. Therefore, d1=d2≥0.2mm can be used as a reference for the values ​​of d1 and d2, but it should be noted that d1 and d2 cannot be too large. For example, the values ​​of d1 and d2 can preferably be 0.2mm. Under this premise, it can be ensured that the centrifuge assembly 1 will not generate excessive stress or vibration during operation due to excessive tightness or looseness between the first seal 14 and the corresponding first wall 111 or fourth wall 131, which helps to maintain the stability of the equipment and extend the service life of the equipment.

[0056] According to an embodiment of the present invention, a gap between the first sealing tooth 141 and the second sealing tooth in the extension direction of the first gap 101 is d3, and satisfies: d3 ≥ 0.1 mm.

[0057] like Figure 4As shown, the radial gap between the first sealing tooth 141 and the second sealing tooth 142 is d3. During the operation of the centrifuge assembly 1, the impeller 13 will shake to a certain extent during the rotation. Therefore, the value of d3 will affect the rotation of the impeller 13. Specifically, when the value of d3 is less than 0.1 mm, the radial gap between the first sealing tooth 141 and the second sealing tooth 142 is too small. At this time, the rotation of the impeller 13 will be affected by the first sealing tooth 141, and friction may occur between the first sealing tooth 141 and the second sealing tooth 142, resulting in damage to the impeller 13. Therefore, d3 ≥ 0.1 mm can ensure that the rotation of the impeller 13 will not be affected by the first wall 111 or the first sealing tooth 141, but it should be noted that the value of d3 cannot be too large, otherwise it will cause the width of the first gap 101 to increase, thereby increasing the gas leakage loss of the centrifuge assembly 1. In actual processing, d3 = 0.1 mm can be preferably selected. Such a setting scheme can ensure that the rotation of the impeller 13 is not affected while avoiding the first gap 101 from being too large.

[0058] According to one embodiment of the utility model, Figure 5 As shown, the distance between the end of the third sealing tooth 15 and the third wall 121 is d4, and satisfies: d4 ≥ 0.1 mm. The value of d4 is the same as that of d1 and d2, but it should be noted that, since no sealing teeth are provided on the third wall 121 in this embodiment, there is no need to consider the matching relationship between the third sealing teeth 15 and the sealing teeth on the third wall 121. Therefore, the value of d4 can be smaller than the values ​​of d1 and d2. For example, d4 can be 0.1 mm. At this time, the value of d4 can reduce the width of the second gap 102, thereby reducing the gas leakage loss of the centrifuge assembly 1; when d4 < 0.1 mm, the width of the second gap 102 is too small, and the rotating shaft 12 is prone to friction and collision with the third sealing teeth 15 during rotation. Therefore, when d4 ≥ 0.1 mm or preferably 0.1 mm, the gas leakage loss of the centrifuge assembly 1 can be reduced under the premise of ensuring the normal rotation of the rotating shaft 12.

[0059] According to an embodiment of the present invention, a fourth sealing tooth 16 is formed on the inner wall of the pivot hole, and the fourth sealing tooth 16 is configured to be a plurality of teeth spaced apart in the axial direction. Figure 2As shown, since one end of the rotating shaft 12 passes through the pivot hole and is connected to the impeller 13, there is also a gap between the pivot hole and the rotating shaft 12, which can be understood as the third gap 103. When the centrifuge assembly 1 is working, a part of the integral body can pass through the first gap 101, the third gap 103 and the second gap 102 in sequence and enter the motor cavity to cause gas leakage loss. In this process, a fourth sealing tooth 16 protruding toward the rotating shaft 12 can be formed on the inner wall of the pivot hole. The fourth sealing tooth 16 can be multiple and the multiple fourth sealing teeth 16 are arranged at intervals in the axial direction. The setting of multiple fourth sealing teeth 16 can change the flow path of the gas in the third gap 103. At the same time, the fourth sealing tooth 16 can also produce a certain obstruction to the flow of the gas in the third gap 103, reducing the flow rate of the gas entering the third gap 103, which can effectively reduce the gas leakage loss of the centrifuge assembly 1.

[0060] According to one embodiment of the utility model, the shell 11 includes a shell body 113 and a sealing component 114, and a first hole is formed on the shell body 113; the sealing component 114 is accommodated in the first hole and the sealing component 114 is respectively formed with a first wall 111 and a second wall 112 on both sides in the thickness direction, and a pivot hole suitable for the rotating shaft 12 to pass through is formed on the sealing component 114.

[0061] By integrating the sealing component 114 into the housing body 113, the entire structure becomes more compact, which is conducive to reducing the overall size of the device. At the same time, since the sealing component 114 is closely matched with the housing body 113, the structural stability of the centrifuge assembly 1 is also enhanced. In addition, a first hole is provided on the housing body 113, and the sealing component 114 is received in the first hole, which facilitates the assembly or disassembly of the sealing component 114.

[0062] The first wall 111 and the second wall 112 are respectively processed on both side surfaces of the sealing component 114 in the thickness direction, so as to complete the design scheme that the first wall 111 and the second wall 112 are parallel to each other.

[0063] In some embodiments, a diffuser is sleeved on the outer periphery of the sealing component 114, and the diffuser is accommodated in the centrifuge housing 11. The first hole can be understood as being opened on the diffuser, and the sealing component 114 is arranged in the first hole and connected to the inner wall of the diffuser.

[0064] According to an embodiment of the utility model, the rotating shaft 12 includes a rotating shaft body 122 and a thrust plate 123, the rotating shaft body 122 passes through the pivot hole and is connected to the impeller 13; the thrust plate 123 is sleeved on the outer circumference of the rotating shaft body 122, and a third wall 121 is formed on the side of the thrust plate 123 facing the sealing component 114. The rotating shaft body 122 passes through the pivot shaft 12, and at the same time, the thrust plate 123 is sleeved on the outer circumference of the rotating shaft body 122, and a third wall 121 is formed on the surface of one side of the thrust plate 123 facing the sealing component 114, which can ensure that the third wall 121 is parallel to the second wall 112, so as to facilitate the arrangement of the third sealing tooth 15 connected to the second wall 112 in the second gap 102.

[0065] According to an embodiment of the present invention, a receiving groove 1131 for accommodating the thrust plate 123 is formed on the housing body 113 and / or the sealing component 114. Figure 1 As shown, a receiving groove 1131 can be processed on the shell body 113. During assembly, the thrust plate 123 can be received in the receiving groove 1131, which improves the stability of the assembly of the thrust plate 123. At the same time, the receiving groove 1131 can limit the thrust plate 123 in the axial direction to prevent the thrust plate 123 from moving axially toward the second wall 112, which would cause friction between the thrust plate 123 and the third sealing tooth 15, thereby affecting the rotation of the rotating shaft 12.

[0066] In some embodiments, the receiving groove 1131 may be processed on the sealing component 114 , or the receiving groove 1131 may be processed on both the shell body 113 and the sealing component 114 .

[0067] The compressor of the present utility model is briefly described below.

[0068] The compressor according to the utility model includes the centrifuge assembly 1 in the above embodiment. Since the compressor according to the utility model is provided with the centrifuge assembly 1 in the above embodiment, when the centrifuge assembly 1 is assembled, the arrangement of the first seal 14 and the second seal reduces the gas leakage loss of the centrifuge assembly 1, thereby improving the efficiency of the compressor.

[0069] The air conditioner according to the utility model is briefly described below.

[0070] The air conditioner according to the utility model includes the compressor in the above embodiment. Since the air conditioner according to the utility model is provided with the compressor in the above embodiment, when the compressor is assembled to the air conditioner, the efficiency of the air conditioner in regulating the temperature can be improved.

[0071] In some embodiments, the cross-section of the first sealing teeth 141 and the second sealing teeth 142 in the radial direction may be a relatively complementary right-angled trapezoid, a triangle or a rectangle, etc., wherein a right-angled trapezoid is preferred. In the first gap 101, the first sealing teeth 141 and the second sealing teeth 142 in the right-angled trapezoid are easier to process and have a high structural strength. The shapes of the third sealing teeth 15 and the fourth sealing teeth 16 in the second gap 102 and the third gap 103 may be selected according to actual conditions.

[0072] In some embodiments, the impeller 13 can be made of high-strength aluminum alloy, which ensures the structural strength of the impeller 13 and improves the service life of the impeller 13; the sealing component 114 is made of steel and connected to the shell body 113. During the operation of the centrifuge assembly 1, the sealing component 114 is fixed. Therefore, the sealing component 114 made of steel has better structural stability and can improve the service life of the sealing component 114; the first sealing teeth 141, the second sealing teeth 142, the third sealing teeth 15 and the fourth sealing teeth 16 can be made of bus alloy material, which is soft and can be liquefied when subjected to high friction temperature, fully ensuring that the impeller 13 will not be damaged when unexpected friction occurs during the operation of the centrifuge assembly 1, and will not affect the dynamic balance of the rotor.

[0073] In some embodiments, at least part of the outer circumference of the rotating shaft 12 may also be sleeved with a sleeve 104, and the outer surface of the sleeve 104 is spaced from the inner wall of the pivot hole on the sealing component 114 to form a third gap 103. A fifth sealing tooth protruding toward the fourth sealing tooth 16 may also be provided on the sleeve 104, and the cooperation between the fifth sealing tooth and the fourth sealing tooth 16 may be consistent with the cooperation between the first sealing tooth 141 and the second sealing tooth 142.

[0074] In summary, the centrifuge assembly 1 is provided with a sealing component 114 in the housing 11, and the sealing component 114 is formed with a first wall 111 and a second wall 112 which are parallel to each other, and a pivot hole which penetrates the sealing component 114 and connects the first wall 111 with the second wall 112. The rotating shaft 12 can rotatably pass through the pivot hole and is connected to the impeller 13. The impeller 13 is formed with a fourth wall 131 corresponding to the first wall 111, and a first gap 101 is defined between the fourth wall 131 and the first wall 111. At the same time, the first wall 111 is provided with a first sealing tooth 141 which protrudes toward the fourth wall 131, and the fourth wall 131 is provided with a second sealing tooth 142 which protrudes toward the first wall 111. The first sealing tooth 141 and the second sealing tooth 142 cooperate with each other to change the gas flow path in the first gap 101 and hinder the flow of the gas, and can reduce the width of the first gap 101 to reduce the amount of gas passing through the first gap 101, thereby reducing the gas leakage loss of the centrifuge assembly 1. The rotating shaft 12 is also provided with a thrust plate 123, and at least part of the outer periphery of the thrust plate 123 is formed with a third wall 121 directly opposite to the second wall 112, a second gap 102 is formed between the second wall 112 and the third wall 121, and the second wall 112 is provided with a third sealing tooth 15 protruding toward the third wall 121; similarly, a third gap 103 is defined between the inner wall of the pivot hole and the rotating shaft 12, and a fourth sealing tooth 16 protruding toward the rotating shaft 12 is formed on the inner wall of the pivot hole. The third sealing tooth 15 and the fourth sealing tooth 16 can respectively change the flow path of the gas in the second gap 102 and the third gap 103 and hinder the gas in the respective corresponding gaps. When the impeller 13 rotates, a portion of the gas passes through the first gap 101, the third gap 103 and the second gap 102 in sequence and flows into the motor cavity, causing leakage loss. The setting of the above four sealing teeth can reduce such leakage loss, and there is a dynamic complementary relationship between the first gap 101 and the second gap 102, which can further reduce the gas that finally enters the motor cavity, reduce gas leakage, and improve the efficiency of the centrifuge assembly 1.

[0075] Description of the drawings: Figure 1 to Figure 5 In the figure, the first wall 111 can be represented by the tooth bottom position of the first sealing tooth 141 or by the planes on both sides of the first sealing tooth 141 in the radial direction; the second wall 112 can be represented by the tooth bottom position of the third sealing tooth 15 or by the planes on both sides of the third sealing tooth 15 in the radial direction.

[0076] 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 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 referred device or element 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.

[0077] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0078] In the description of the present invention, "plurality" means two or more.

[0079] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0080] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0081] 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 utility model. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0082] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate 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. A centrifuge assembly, characterized in that: include: A housing (11), the housing (11) having a first wall (111) and a second wall (112), the housing (11) being provided with a through pivot hole for connecting the first wall (111) and the second wall (112); a rotating shaft (12), the rotating shaft (12) passing through the pivot hole, and a third wall (121) directly facing the second wall (112) being formed on the rotating shaft (12); an impeller (13), the impeller (13) being connected to the rotating shaft (12) and being located on one side of the housing (11), and a fourth wall (131) being formed on a surface of the impeller (13) facing the first wall (111); wherein At least one of the first wall (111) and the fourth wall (131) is provided with a first seal (14), and the first seal (14) is suitable for sealing a first gap (101) between the first wall (111) and the fourth wall (131); At least one of the second wall (112) and the third wall (121) is provided with a second seal, and the second seal is suitable for sealing a second gap (102) between the second wall (112) and the third wall (121).

2. The centrifuge assembly (1) according to claim 1, characterized in that The first sealing member (14) comprises: first sealing teeth (141), the first sealing teeth (141) being formed on the first wall (111) and being configured as a plurality of first sealing teeth (141) spaced apart in an extending direction of the first wall (111); The second sealing teeth (142) are formed on the fourth wall (131) and are configured as a plurality of second sealing teeth (142) arranged at intervals in the extending direction of the fourth wall (131); The first sealing tooth (141) is arranged between two adjacent second sealing teeth (142).

3. The centrifuge assembly (1) according to claim 2, characterized in that The second sealing member is configured as a third sealing tooth (15), wherein the third sealing tooth (15) is configured as a plurality of third sealing teeth (15) arranged at intervals in the extension direction of the second wall (112) and / or the third sealing teeth (15) are configured as a plurality of third sealing teeth (15) arranged at intervals on the third wall (121).

4. The centrifuge assembly (1) according to claim 3, characterized in that The first wall (111) is parallel to the second wall (112), and after the gap between the first sealing tooth (141) and the second sealing tooth (142) increases, the gap between the second wall (112) and the third wall (121) decreases.

5. The centrifuge assembly (1) according to claim 4, characterized in that The distance between the end of the first sealing tooth (141) and the fourth wall (131) is d1, the distance between the end of the second sealing tooth (142) and the first wall (111) is d2, and the following condition is satisfied: d1=d2≥0.2 mm.

6. The centrifuge assembly (1) according to claim 4, characterized in that The gap between the first sealing tooth (141) and the second sealing tooth in the extension direction of the first gap (101) is d3, and satisfies: d3≥0.1 mm.

7. The centrifuge assembly (1) according to claim 3, characterized in that The distance between the end of the third sealing tooth (15) and the third wall (121) is d4, and satisfies: d4≥0.1 mm.

8. The centrifuge assembly (1) according to claim 1, characterized in that A fourth sealing tooth (16) is formed on the inner wall of the pivot hole, and the fourth sealing tooth (16) is configured to be a plurality of teeth spaced apart in the axial direction.

9. The centrifuge assembly (1) according to claim 1, characterized in that The housing (11) comprises: A shell body (113), wherein a first hole is formed on the shell body (113); A sealing component (114), the sealing component (114) is received in the first hole and the first wall (111) and the second wall (112) are respectively formed on both sides of the sealing component (114) in the thickness direction, and the sealing component (114) is formed with the pivot hole suitable for the rotating shaft (12) to pass through.

10. The centrifuge assembly (1) according to claim 9, characterized in that The rotating shaft (12) comprises: A rotating shaft body (122), the rotating shaft body (122) passes through the pivot hole and is connected to the impeller (13); A thrust plate (123) is sleeved on the outer circumference of the rotating shaft body (122), and the third wall (121) is formed on a side of the thrust plate (123) facing the sealing component (114).

11. The centrifuge assembly (1) according to claim 10, characterized in that A receiving groove (1131) for accommodating the thrust plate (123) is formed on the housing body (113) and / or the sealing component (114).

12. A compressor, characterized in that: A centrifuge assembly (1) comprising any one of claims 1-11.

13. An air conditioner, characterized in that: Comprising the compressor as claimed in claim 12.

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