Engineering machinery with labyrinth assembly

Abstract

The invention provides an engineering machine with a labyrinth assembly, which comprises a fixing piece, a labyrinth assembly and a labyrinth assembly, a gas film or an oil film is formed between the rotating part and the bearing so as to support the rotating part to rotate; the comb tooth assembly comprises a plurality of first annular metal sheets and second annular metal sheets which are stacked in the axial direction, and the comb tooth assembly is installed in the comb tooth area of the fixed part and located in the circumferential direction of the rotating part; the thickness of the first annular metal sheets and the thickness of the second annular metal sheets are both 0.2 mm-0. 5mm, the first annular metal sheets protrude out of the second annular metal sheets inwards in the radial direction, and tooth cavity structures are defined by the adjacent first annular metal sheets and the second annular metal sheets located between the adjacent first annular metal sheets in the circumferential direction of the rotating piece. And at most two second annular metal sheets are arranged between the adjacent first annular metal sheets, so that more tooth cavity structures are formed in the labyrinth area, and the air sealing effect on the engineering machinery is improved.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to an engineering machinery having a comb tooth assembly. Background Art

[0002] In the prior art, a comb tooth structure is machined on a fixed part (bearing seat, motor housing, volute, etc.) to seal the air of the engineering machinery. However, the number of comb teeth of the comb tooth structure machined in the above manner is limited, which means that the number of tooth cavity structures formed by adjacently arranged comb teeth is limited, resulting in a poor air sealing effect. Summary of the invention

[0003] In view of this, the present application provides an engineering machinery with a comb tooth structure, which can be provided with a tooth cavity structure with more comb teeth to improve the air sealing effect of the engineering machinery.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] An engineering machine with a comb tooth assembly, comprising:

[0006] A fixing member provided with a bearing;

[0007] A rotating member, with an air film or an oil film formed between the rotating member and the bearing to support the rotating member to rotate;

[0008] A comb tooth assembly, comprising a plurality of first annular metal sheets and a second annular metal sheet stacked in the axial direction, wherein the comb tooth assembly is mounted on the comb tooth area of ​​the fixed member and is located in the circumferential direction of the rotating member;

[0009] Among them, the thickness of the first annular metal sheet and the second annular metal sheet are both 0.2mm-0.5mm, and radially inward, the first annular metal sheet protrudes from the second annular metal sheet, and the adjacent first annular metal sheets and the second annular metal sheets located between the adjacent first annular metal sheets circumferentially surround the rotating part to form a tooth cavity structure, and at most two second annular metal sheets are arranged between adjacent first annular metal sheets to form a plurality of tooth cavity structures in the comb tooth area.

[0010] Optionally, in the above-mentioned engineering machinery with the comb tooth assembly, the stator core of the motor is made of a part of the silicon steel sheet, and the remaining part of the silicon steel sheet is used to make the annular metal sheet.

[0011] Optionally, in the above-mentioned engineering machinery having the comb tooth assembly, the first annular metal sheets and the second annular metal sheets are alternately arranged.

[0012] Optionally, in the above-mentioned engineering machinery with the comb tooth assembly, the tooth pitch of the tooth cavity structure is A, and the tooth depth of the tooth cavity structure is B, wherein B:A=4±0.5.

[0013] Optionally, in the above-mentioned engineering machinery with the comb teeth assembly, the first annular metal sheet and the second annular metal sheet constitute a first air sealing component, and the outer diameter of the first annular metal sheet is the same as the outer diameter of the second annular metal sheet;

[0014] The comb tooth assembly further includes a third annular metal sheet and a fourth annular metal sheet, the third annular metal sheet and the fourth annular metal sheet constitute a second air sealing component, the third annular metal sheet protrudes from the fourth annular metal sheet radially inward, at most two fourth annular metal sheets are arranged between adjacent third annular metal sheets, and the outer diameter of the third annular metal sheet is the same as the outer diameter of the fourth annular metal sheet;

[0015] The outer diameter of the first annular metal sheet is greater than the outer diameter of the third annular metal sheet, and in the axial direction, the first air sealing component and the second air sealing component are arranged adjacent to each other so that the comb tooth assembly is adapted to the comb tooth area.

[0016] Optionally, in the above-mentioned engineering machinery having the comb tooth assembly, the third annular metal sheets and the fourth annular metal sheets are alternately arranged.

[0017] Optionally, in the above-mentioned engineering machinery with the comb tooth assembly, the inner diameter of the first annular metal sheet is the same as the inner diameter of the third annular metal sheet.

[0018] Optionally, in the above-mentioned engineering machinery with a comb tooth assembly, the first annular metal sheet of the first air sealing component is arranged adjacent to the fourth annular metal sheet of the second air sealing component, so that the tooth cavity structure is formed between the first annular metal sheet and the third annular metal sheet arranged close to the fourth annular metal sheet.

[0019] Optionally, in the above-mentioned engineering machinery having the comb tooth assembly, in the axial direction, the projection of the fourth annular metal sheet and the projection of the second annular metal sheet have an overlapping area.

[0020] Optionally, in the above-mentioned engineering machinery having the comb tooth assembly, a blocking plate is provided between the fixing member and the comb tooth assembly to limit the position of the comb tooth assembly in the axial direction.

[0021] The present application provides an engineering machinery with a comb tooth assembly, which forms a large number of tooth cavity structures by utilizing annular metal sheets with a thickness of 0.2mm-0.5mm and different inner diameters to improve the air sealing effect. Specifically, the inner diameter of the first annular metal sheet is smaller than the inner diameter of the second annular metal sheet, that is, in the radial direction, the first annular metal sheet protrudes from the second annular metal sheet, so that in the circumferential direction of the rotating part, adjacent first annular metal sheets and the second annular metal sheets located between adjacent first annular metal sheets enclose a tooth cavity structure, and at most two second annular metal sheets are arranged between adjacent first annular metal sheets, so that a large number of tooth cavity structures can be formed in the comb tooth area to seal the engineering machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the partial structure of an engineering machinery with a comb tooth assembly provided in an embodiment of the present application.

[0024] exist Figure 1 middle:

[0025] 1. Fixing parts; 11. Bearing;

[0026] 2. Rotating part; 3. Comb tooth assembly; 4. Blocking plate;

[0027] 31. The first air sealing component; 32. The second air sealing component. DETAILED DESCRIPTION

[0028] The present application provides an engineering machinery with a comb tooth structure, which can be provided with a tooth cavity structure with more comb teeth to improve the air sealing effect on the engineering machinery.

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] like Figure 1As shown, an embodiment of the present application provides an engineering machinery with a comb tooth structure, including a fixed part 1, a rotating part 2, and a comb tooth assembly 3. It should be noted that the rotating part can be but is not limited to a rotating shaft. The bearing 11 of the fixed part 1 is arranged opposite to the rotating part 2, and forms an air film or an oil film, which can support the rotation of the rotating part 2; the comb tooth assembly 3 is installed in the comb tooth area of ​​the fixed part 1, and includes a plurality of first annular metal sheets and second annular metal sheets stacked in the axial direction. It should be noted that the comb tooth area is an area in the prior art where the comb teeth are formed by cutting on the fixed part 1 by a tool. The annular metal sheet is located in the circumferential direction of the rotating part 2, and is very close to the rotating part 2 but in a non-contact state, that is, the outer peripheral wall of the rotating part 2 is non-contacting with the inner wall of the annular metal sheet. The thickness of the first annular metal sheet and the second annular metal sheet are both 0.2mm-0.5mm (including the endpoint values), and the inner diameter of the first annular metal sheet is smaller than the inner diameter of the second annular metal sheet, that is, in the radial direction, the first annular metal sheet protrudes out of the second annular metal sheet, so that in the circumferential direction of the rotating part 2, adjacent first annular metal sheets and the second annular metal sheets located between adjacent first annular metal sheets enclose a tooth cavity structure, and at most two second annular metal sheets are arranged between adjacent first annular metal sheets, so that a large number of tooth cavity structures can be formed in the comb tooth area to seal the engineering machinery.

[0031] It should be noted that the comb tooth assembly 3 and the fixing member 1 are interference fitted; the rotating member 2 can be but is not limited to a rotating shaft.

[0032] In an optional embodiment, the stator core of the motor is partially made of silicon steel sheets, and the remaining parts of the silicon steel sheets are used to make annular metal sheets. It can be understood that the annular metal sheets are annular silicon steel sheets. At present, the stator core of the motor needs to cut or punch out the internal mold lines during the manufacturing process. The cut or punched silicon steel sheets can only be scrapped because they cannot be used anymore, which causes a waste of resources. By using the remaining silicon steel sheets cut or punched for processing, and then forming the annular metal sheets required for the comb tooth assembly 3, not only resources are saved, but also the processing accuracy of the comb tooth assembly 3 is improved and the processing difficulty is reduced. At the same time, because the silicon steel sheets have a thinner thickness than other metal sheets, they can enclose a larger number of tooth cavity structures, thereby improving the utilization rate of the comb tooth area.

[0033] In another optional embodiment, the annular metal sheet may also be made of processing waste materials of other engineering machinery, thereby improving resource utilization.

[0034] In an optional embodiment, the first annular metal sheet and the second annular metal sheet are alternately arranged. It can be understood that a second annular metal sheet is arranged between adjacent first annular metal sheets. In this way, a larger number of tooth cavity structures are formed, thereby improving the air sealing effect.

[0035] In an optional embodiment, the tooth pitch of the tooth cavity structure is A, and the tooth depth of the tooth cavity structure is B, wherein B:A=4±0.5. In the prior art, the ratio of tooth depth to tooth pitch is up to 1.5. The present application uses an annular metal sheet to form the comb tooth assembly 3, which not only increases the tooth depth but also shortens the tooth pitch, thereby improving the air sealing effect of the engineering machinery.

[0036] In an optional embodiment, the first annular metal sheet and the second annular metal sheet constitute a first air sealing component 31, and the outer diameter of the first annular metal sheet is the same as the outer diameter of the second annular metal sheet; the comb tooth assembly 3 also includes a third annular metal sheet and a fourth annular metal sheet, and the third annular metal sheet and the fourth annular metal sheet constitute a second air sealing component 32, and radially inwardly, the third annular metal sheet protrudes from the fourth annular metal sheet, and at most two fourth annular metal sheets are arranged between adjacent third annular metal sheets, and the outer diameter of the third annular metal sheet is the same as the outer diameter of the fourth annular metal sheet; wherein the outer diameter of the first annular metal sheet is greater than the outer diameter of the third annular metal sheet, and in the axial direction, the first air sealing component 31 and the second air sealing component 32 are arranged adjacent to each other so that the comb tooth assembly 3 is adapted to the comb tooth area.

[0037] The above can be understood as follows: the outer diameters of the first air sealing component 31 and the second air sealing component 32 have a height difference and are arranged adjacent to each other in the axial direction, so as to adapt to the comb tooth area on the fixing member 1, thereby stabilizing the entire engineering machinery. In addition, the arrangement of the second air sealing component 32 lengthens the length of the comb tooth assembly 3 in the axial direction, thereby improving the air sealing effect.

[0038] It should be noted that the number of air sealing components is not limited to two groups and can be set according to actual conditions.

[0039] Furthermore, the third annular metal sheet and the fourth annular metal sheet are arranged alternately. It can be understood that a fourth annular metal sheet is arranged between adjacent third annular metal sheets. In this way, a larger number of tooth cavity structures are formed, thereby improving the air sealing effect.

[0040] In addition, the inner diameter of the first annular metal sheet is the same as the inner diameter of the third annular metal sheet, that is, the inner wall of the first annular metal sheet and the inner wall of the third annular metal sheet are at the same distance from the outer peripheral wall of the rotating member 2, thereby maintaining the stability of the airflow.

[0041] In another optional embodiment, the inner diameter of the first annular metal sheet may be different from the inner diameter of the third annular metal sheet, that is, the inner diameter of the first annular metal sheet may be smaller than or larger than the inner diameter of the third annular metal sheet.

[0042] In an optional embodiment, the first annular metal sheet of the first air sealing component 31 is arranged adjacent to the fourth annular metal sheet of the second air sealing component 32, so that a tooth cavity structure is formed between the first annular metal sheet and the third annular metal sheet arranged close to the fourth annular metal sheet. In this way, a tooth cavity structure can be formed at the connecting position of the first air sealing component 31 and the second air sealing component 32, that is, a tooth cavity structure is added within the same length, thereby improving the air sealing effect.

[0043] In an optional embodiment, in the axial direction, the projection of the fourth annular metal sheet has an overlapping area with the projection of the second annular metal sheet. It can be understood that the outer diameter of the fourth annular metal sheet is greater than the inner diameter of the second annular metal sheet, and the outer diameter of the fourth annular metal sheet is smaller than the outer diameter of the second annular metal sheet. In this way, when the first air sealing component 31 and the second air sealing component 32 are connected, the second air sealing component 32 is prevented from axially squeezing the easily deformed position of the first air sealing component 31. It should be noted that the easily deformed position refers to the position where multiple first annular metal sheets are protruded toward the rotating member 2 compared to multiple second annular metal sheets.

[0044] In an optional embodiment, a blocking plate 4 is provided between the fixing member 1 and the comb tooth assembly 3, and the blocking plate 4 is fixed to the fixing member 1 by screws to limit the displacement of the comb tooth assembly 3 in the axial direction, so as to improve the stability of the engineering machinery.

[0045] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0046] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0047] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0048] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0049] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0050] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. An engineering machine with a comb tooth assembly, characterized in that: include: A fixing member provided with a bearing; A rotating member, with an air film or an oil film formed between the rotating member and the bearing to support the rotating member to rotate; A comb tooth assembly, comprising a plurality of first annular metal sheets and a second annular metal sheet stacked in the axial direction, wherein the comb tooth assembly is mounted on the comb tooth area of ​​the fixed member and is located in the circumferential direction of the rotating member; Among them, the thickness of the first annular metal sheet and the second annular metal sheet are both 0.2mm-0.5mm, and radially inward, the first annular metal sheet protrudes from the second annular metal sheet, and the adjacent first annular metal sheets and the second annular metal sheets located between the adjacent first annular metal sheets circumferentially surround the rotating part to form a tooth cavity structure, and at most two second annular metal sheets are arranged between adjacent first annular metal sheets to form a plurality of tooth cavity structures in the comb tooth area.

2. The engineering machinery with the comb tooth assembly according to claim 1, characterized in that: The stator core of the motor is made of a part of the silicon steel sheet, and the remaining part of the silicon steel sheet is used to make the annular metal sheet.

3. The engineering machinery with the comb tooth assembly according to claim 1, characterized in that: The first annular metal sheets and the second annular metal sheets are arranged alternately.

4. The engineering machinery with the comb tooth assembly according to claim 1, characterized in that: The tooth pitch of the tooth cavity structure is A, and the tooth depth of the tooth cavity structure is B, wherein B:A=4±0.

5.

5. The engineering machinery with the comb tooth assembly according to claim 1, characterized in that: The first annular metal sheet and the second annular metal sheet constitute a first air sealing assembly, and the outer diameter of the first annular metal sheet is the same as the outer diameter of the second annular metal sheet; The comb tooth assembly further includes a third annular metal sheet and a fourth annular metal sheet, the third annular metal sheet and the fourth annular metal sheet constitute a second air sealing component, the third annular metal sheet protrudes from the fourth annular metal sheet radially inward, at most two fourth annular metal sheets are arranged between adjacent third annular metal sheets, and the outer diameter of the third annular metal sheet is the same as the outer diameter of the fourth annular metal sheet; The outer diameter of the first annular metal sheet is greater than the outer diameter of the third annular metal sheet, and in the axial direction, the first air sealing component and the second air sealing component are arranged adjacent to each other so that the comb tooth assembly is adapted to the comb tooth area.

6. The engineering machinery with the comb tooth assembly according to claim 5, characterized in that: The third annular metal sheets and the fourth annular metal sheets are arranged alternately.

7. The engineering machinery with the comb tooth assembly according to claim 5, characterized in that: The inner diameter of the first annular metal sheet is the same as the inner diameter of the third annular metal sheet.

8. The engineering machinery with the comb tooth assembly according to claim 5, characterized in that: The first annular metal sheet of the first air sealing component is disposed adjacent to the fourth annular metal sheet of the second air sealing component.

9. The engineering machinery with the comb tooth assembly according to claim 5, characterized in that: In the axial direction, the projection of the fourth annular metal sheet and the projection of the second annular metal sheet have an overlapping area.

10. The engineering machinery with the comb tooth assembly according to claim 1, characterized in that: A blocking plate is arranged between the fixing member and the comb tooth assembly to limit the position of the comb tooth assembly in the axial direction.

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