Turbine structure and axial flow fan with same

Abstract

The utility model discloses a turbine structure and an axial flow fan with the turbine structure, and relates to the technical field of turbines, the turbine structure comprises a central disc and a plurality of impellers uniformly distributed on the periphery of the central disc, mortises are uniformly formed in the central disc, and tenons matched with the mortises are arranged at the roots of the impellers. The center disc is provided with a first end face and a second end face, the mortise penetrates through the first end face and the second end face of the center disc, the first end face and the second end face of the center disc are each provided with an end pressing plate used for sealing the mortise, the two end pressing plates are tightly attached to the first end face and the second end face respectively, and the end pressing plates abut against the tenons. By the adoption of the technical scheme, the tenon groove is sealed through the end pressing plate, meanwhile, the end pressing plate abuts against the tenon, the tenon is not prone to displacement in the tenon groove, the stability of an impeller is guaranteed when a turbine rotates, meanwhile, assembling is convenient, the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of turbines, and particularly relates to a turbine structure and an axial flow fan with the turbine structure. Background Art

[0002] In the traditional fixing method of a turbine disk and blades, the turbine blades are matched with the dovetail groove structure on the turbine disk through dovetails, so as to embed the turbine into the periphery of the turbine disk. To ensure the stability of the blades when the turbine rotates, a locking mechanism also needs to be arranged on the turbine disk to realize the limitation and fixation of the blades.

[0003] For example, CN212837968U discloses a locking mechanism for a turbine disk and blades of a turboprop engine, which includes a turbine disk and a plurality of blades uniformly distributed on the periphery of the turbine disk. The outer periphery of the turbine disk is uniformly provided with a dovetail groove structure, and the dovetail groove structure is composed of a first dovetail groove located on the outer side and a second dovetail groove located on the inner side, and the first dovetail groove communicates with the second dovetail groove. The root of the blade is provided with a dovetail head mechanism, and the dovetail head structure is composed of a first dovetail head and a second dovetail head located at the end of the first dovetail head. The first dovetail head is embedded in the first dovetail groove; the second dovetail head is embedded in the second dovetail groove and is locked and fixed by a lock piece embedded between the second dovetail head and the second dovetail groove. When the blade and the turbine disk are matched through the dovetail head and the dovetail groove, only by inserting the lock piece and bending it can the fixation of the dovetail head mechanism of the blade be realized.

[0004] However, since the turbine disk and the blades generally need to bear large working stresses and high working temperatures, and the stress and temperature change frequently and violently, fixing the blades by a lock piece requires high machining precision for the lock piece, the dovetail head and the dovetail groove. Due to slightly tolerances in the preparation of the blades, and during the assembly of the blades, there are tolerance offsets in the axial direction of the turbine disk between the blades, which easily causes the blades to vibrate when the turbine rotates. At the same time, there will be gaps when the lock piece is inserted between the dovetail head and the dovetail groove, and it is difficult to ensure the connection stability between the blade and the turbine disk. Content of the Utility Model

[0005] The purpose of the utility model is to aim at the defects and deficiencies in the prior art, and the utility model provides a turbine structure and an axial flow fan with the turbine structure.

[0006] The technical solution adopted by a turbine structure provided by the utility model is: a turbine structure, including a central disk and a plurality of impellers uniformly distributed on the periphery of the central disk. The central disk is uniformly provided with dovetail grooves, and the root of the impeller is provided with dovetails matched with the dovetail grooves. The central disk has a first end face and a second end face, the dovetail grooves penetrate through the first end face and the second end face of the central disk, and end pressing plates for closing the dovetail grooves are arranged on both the first end face and the second end face of the central disk. The two end pressing plates are respectively close to the first end face and the second end face, and the end pressing plates are abutted against the dovetails.

[0007] Optionally, the mortise groove is inclined along the axial direction of the central disk, and the tenon is in close fit with the mortise groove.

[0008] Optionally, a plurality of tooth grooves are symmetrically provided on two opposite inner walls of the mortise groove, convex teeth corresponding to the tooth grooves are provided on both sides of the tenon, and the tenon can slide along the length direction of the mortise groove so that the tenon can enter the mortise groove from one end of the mortise groove and slide to the other end of the mortise groove.

[0009] Optionally, the impeller has a radian curve consistent with the inclination direction of the mortise groove.

[0010] Optionally, the mortise grooves are uniformly distributed on the side wall of the central disk along the circumferential direction of the central disk.

[0011] Optionally, the size of the end pressing plate is adapted to the central disk, and the edge of the end pressing plate is flush with the edge of the central disk.

[0012] Optionally, a plurality of positioning holes are formed on both the first end face and the second end face of the central disk, the plurality of positioning holes are uniformly distributed between the mortise grooves, a plurality of mounting holes corresponding to the positioning holes one by one are formed on the end pressing plate, and the positioning holes and the mounting holes are used for inserting bolts to realize the connection and fixation between the end pressing plate and the central disk.

[0013] The present application also provides an axial flow fan, including a housing, the turbine structure as described above, and a driving motor for driving the turbine structure to rotate.

[0014] After adopting the above technical solution, the beneficial effect of the present utility model is:

[0015] During the assembly of the present application, through the cooperation between the tenon on the impeller and the mortise groove on the central disk, the impellers are evenly distributed on the circumferential side of the central disk. The two ends of the mortise groove are closed by the end pressing plate, and the end pressing plate presses against the tenon, so that when the turbine rotates, the impellers are not likely to shake, the processing difficulty is reduced, the connection between the impeller and the central disk is relatively stable, the overall stability of the turbine is improved, and at the same time, the assembly is convenient and the production efficiency is improved. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1It is a schematic diagram of the overall structure of this embodiment;

[0018] Figure 2 It is an exploded view of this embodiment with some impellers removed;

[0019] Figure 3 It is a schematic diagram for showing the assembly relationship between the impeller and the central disk in this embodiment.

[0020] Explanation of reference numerals: 10, central disk; 11, mortise groove; 111, tooth groove; 12, positioning hole; 101, first end face; 102, second end face; 20, impeller; 21, tenon; 211, convex tooth; 30, end pressing plate; 31, mounting hole. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the attached Figures 1-3 , Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] It should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "back", "side", "circumferential", etc. of the present utility model indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model 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 construed as a limitation of the present utility model. In addition, the terms such as the first and the second are only used to distinguish multiple components or structures with the same or similar structures, and do not represent a special limitation on the setting order or connection relationship.

[0023] This embodiment relates to a turbine structure. Referring to Figures 1-3 , it includes a central disk 10 and a plurality of impellers 20 evenly distributed around the periphery of the central disk 10. Mortise grooves 11 are evenly formed on the central disk 10, and tenons 21 adapted to the mortise grooves 11 are provided at the roots of the impellers 20. The connection between the impellers 20 and the central disk 10 is realized through the cooperation between the tenons 21 on the impellers 20 and the mortise grooves 11 on the central disk 10.

[0024] The central disk 10 has a first end face 101 and a second end face 102. The mortise groove 11 penetrates through the first end face 101 and the second end face 102 of the central disk 10, that is, the length of the mortise groove 11 is the same as the thickness of the central disk 10. End pressing plates 30 for closing the mortise groove 11 are arranged on both the first end face 101 and the second end face 102 of the central disk 10. The two end pressing plates 30 are respectively in close contact with the first end face 101 and the second end face 102, and the end pressing plate 30 abuts against the tenon head 21.

[0025] During assembly, through the cooperation between the tenon head 21 on the impeller 20 and the mortise groove 11 on the central disk 10, rapid positioning of the impeller 20 is achieved, that is, the impeller 20 can be quickly installed on the central disk 10. At this time, the two ends of the mortise groove 11 are closed by the end pressing plates 30 respectively in close contact with the first end face 101 and the second end face 102 of the central disk 10 and abut against the tenon head 21, so that the tenon head 21 is not easily displaced in the mortise groove 11, that is, the impeller 20 is not easily displaced, thereby ensuring the overall stability of the turbine.

[0026] Furthermore, the mortise groove 11 is inclined along the axial direction of the central disk 10, and the tenon head 21 is in close fit with the mortise groove 11.

[0027] It can be understood that by arranging the mortise groove 11 to be inclined along the axial direction of the central disk 10, when the turbine rotates, a force can be provided to the tenon head 21 along its rotation axis direction, thereby further restricting the displacement of the tenon head 21, and further improving the stability of the blades when the turbine rotates.

[0028] Furthermore, a plurality of tooth grooves 111 are symmetrically arranged on two opposite inner walls of the mortise groove 11, and convex teeth 211 corresponding to the tooth grooves 111 are arranged on both sides of the tenon head 21. The tenon head 21 can slide along the length direction of the mortise groove 11, so that the tenon head 21 can enter the mortise groove 11 from one end of the mortise groove 11 and slide to the other end of the mortise groove 11.

[0029] It can be understood that through the cooperation between the tooth grooves 111 in the mortise groove 11 and the convex teeth 211 on the tenon head 21, the fit between the tenon head 21 and the mortise groove 11 is made closer. At the same time, during assembly, it is only necessary to push the tenon head 21 into the mortise groove 11 from one end of the mortise groove 11 and slide it to the other end of the mortise groove 11. The operation is simple and convenient, the assembly process is simplified, and the production efficiency is improved.

[0030] Furthermore, the impeller 20 has a radian curve consistent with the inclination direction of the mortise groove 11.

[0031] It can be understood that setting the impeller 20 to be consistent with the inclination direction of the mortise groove 11 enables the turbine to provide a force to the impeller 20 along its rotation axis direction when rotating, restricts the displacement of the impeller 20, and at the same time is more in line with aerodynamics and improves the energy conversion efficiency.

[0032] Furthermore, the mortise grooves 11 are evenly distributed on the side wall of the central disk 10 along the circumferential direction of the central disk 10. By evenly distributing the mortise grooves 11 along the circumferential direction of the central disk 10, that is, the impellers 20 are evenly distributed on the side wall of the central disk 10 along the circumferential direction of the central disk 10, the impellers 20 rotate more stably when the turbine rotates.

[0033] Furthermore, the size of the end pressing plate 30 is adapted to that of the central disk 10, and the edge of the end pressing plate 30 is flush with the edge of the central disk 10. In this embodiment, the diameter of the end pressing plate 30 is equal to the diameter of the central disk 10. In other embodiments, the end pressing plate 30 can also be a ring coaxially arranged with the central disk 10, that is, by closing the mortise grooves 11 with the ring, the limit and fixation of the tenon head 21 can also be realized, which will not be elaborated here.

[0034] Furthermore, a plurality of positioning holes 12 are formed on both the first end face 101 and the second end face 102 of the central disk 10. The plurality of positioning holes 12 are evenly distributed between the mortise grooves 11. A plurality of mounting holes 31 corresponding to the positioning holes 12 one by one are formed on the end pressing plate 30. The positioning holes 12 and the mounting holes 31 are used for inserting bolts to realize the connection and fixation between the end pressing plate 30 and the central disk 10.

[0035] When assembling the turbine, first, the two end pressing plates 30 are respectively abutted tightly against the first end face 101 and the second end face 102 of the central disk 10, and the mounting holes 31 on the end pressing plate 30 are aligned with the positioning holes 12 on the central disk 10. At this time, by passing the bolts through the mounting holes 31 and fixing them in the positioning holes 12, the connection and fixation between the end pressing plate 30 and the central disk 10 are realized. At this time, the connection between the end pressing plate 30 and the central disk 10 is relatively reliable, ensuring the stability of the whole turbine.

[0036] In addition, this embodiment also provides an axial flow fan, which includes a housing, the above-mentioned turbine structure, and a driving motor for driving the rotation of the turbine structure. By applying the above-mentioned turbine structure to the axial flow fan, the stability of the operation of the axial flow fan is ensured, the service life is prolonged, and at the same time, the assembly is simple and convenient, reducing the production cost.

[0037] The above is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention shall be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A turbine structure, comprising a central disk (10) and a plurality of impellers (20) evenly distributed around the periphery of the central disk (10). The central disk (10) is evenly provided with mortise grooves (11), and the root of the impeller (20) is provided with tenons (21) that cooperate with the mortise grooves (11), characterized in that, The central disk (10) has a first end face (101) and a second end face (102). The mortise groove (11) penetrates through the first end face (101) and the second end face (102) of the central disk (10). End pressing plates (30) for closing the mortise groove (11) are arranged on both the first end face (101) and the second end face (102) of the central disk (10). The two end pressing plates (30) are respectively in close contact with the first end face (101) and the second end face (102), and the end pressing plate (30) abuts against the tenon head (21).

2. A turbine structure according to claim 1, characterized in that The mortise groove (11) is inclined along the axial direction of the central disk (10), and the tenon head (21) is in tight fit with the mortise groove (11).

3. The turbine structure according to claim 2, wherein, A plurality of tooth grooves (111) are symmetrically arranged on two opposite inner walls of the mortise groove (11). Convex teeth (211) corresponding to the tooth grooves (111) are arranged on both sides of the tenon head (21). The tenon head (21) can slide along the length direction of the mortise groove (11) so that the tenon head (21) can enter the mortise groove (11) from one end of the mortise groove (11) and slide to the other end of the mortise groove (11).

4. A turbine structure according to claim 2, characterized in that, The impeller (20) has a radian curve consistent with the inclination direction of the mortise groove (11).

5. A turbine structure according to claim 2, characterized in that, The mortise grooves (11) are uniformly distributed on the side wall of the central disk (10) along the circumferential direction of the central disk (10).

6. A turbine structure according to claim 1, characterized in that, The size of the end pressing plate (30) is adapted to that of the central disk (10), and the edge of the end pressing plate (30) is flush with the edge of the central disk (10).

7. A turbine structure according to claim 1, characterized in that, A plurality of positioning holes (12) are formed on both the first end face (101) and the second end face (102) of the central disk (10). The plurality of positioning holes (12) are uniformly distributed between the mortise grooves (11). A plurality of mounting holes (31) corresponding to the positioning holes (12) one by one are formed on the end pressing plate (30). The positioning holes (12) and the mounting holes (31) are used for inserting bolts to realize the connection and fixation between the end pressing plate (30) and the central disk (10).

8. An axial flow fan, characterized in that, It includes a housing, a turbine structure as described in any one of claims 1-7, and a driving motor for driving the turbine structure to rotate.

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