CN219035100U

CN219035100U - Fan main shaft structure

Info

Publication number: CN219035100U
Application number: CN202320063891.XU
Authority: CN
Inventors: 蒋云明; 刘勇; 蒋兴国
Original assignee: Suzhou Yonghecheng Fan Industry Co ltd
Current assignee: Suzhou Yonghecheng Fan Industry Co ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-05-16
Anticipated expiration: 2033-01-10

Abstract

The utility model discloses a fan main shaft structure which comprises a fan blade fixing sleeve, a thick shaft and a conversion spline ring, wherein an outer spline groove is formed in the thick shaft, inner teeth matched with the outer spline groove are arranged in the conversion spline ring, an inner spline groove is formed in the inner surface of the fan blade fixing sleeve, outer teeth matched with the inner spline groove are arranged on the outer surface of the conversion spline ring, one end of the outer teeth is provided with a first tip, and one end of the inner teeth away from the first tip is provided with a second tip. According to the utility model, the conversion spline ring is arranged, the fan blade can be fixedly locked in the thick shaft through the conversion spline ring, compared with the mode of directly inserting the fan blade fixing sleeve into the thick shaft through the spline, the conversion spline ring is used for enabling the stress of the thick shaft to be more uniform, avoiding the fracture condition caused by uneven stress of the thick shaft, and the tip ends are arranged on the external teeth and the internal teeth, so that the external teeth can be more conveniently inserted into the internal spline groove, and the internal teeth can be more conveniently inserted into the external spline groove.

Description

Fan main shaft structure

Technical Field

The utility model relates to the technical field of fan spindles, in particular to a fan spindle structure.

Background

At present, most of domestic fan main shafts are solid steel shafts, and main shaft blanks are forged pieces or hot-rolled bars; the main characteristics are that: the processing technology is simple, the material consumption is high, the main shaft weight is high, and the bearing load is high. As the number of stages of the multistage centrifugal blower increases due to the increase of the pressure ratio, the corresponding supporting center span and the length of the main shaft also increase. Meanwhile, because of the design requirement of the critical rotation speed of the rotor, the large-span main shaft must be ensured to have enough rigidity;

in the prior art, in order to connect the fan blade ring and the main shaft, a mode of arranging a bulge on the main shaft is generally adopted for assembly, but one bulge can lead to uneven stress of the main shaft and lead to breakage of the main shaft.

Disclosure of Invention

The utility model aims to provide a fan main shaft structure which aims to solve the problems that in the prior art, in order to connect a fan blade ring with a main shaft, a boss is arranged on the main shaft for assembly, but one boss can cause uneven stress of the main shaft and cause the main shaft to break.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a fan spindle structure, includes fan blade fixed cover, thick axle and conversion spline ring, outer spline groove has been seted up on the thick axle, on the inside of conversion spline ring be equipped with outer spline groove complex internal tooth, the internal surface of fan blade fixed cover is equipped with interior spline groove, the surface of conversion spline ring be equipped with interior spline groove complex external tooth.

Preferably, one end of the external teeth is provided as a first tip.

Preferably, the end of the internal teeth remote from the first tip is provided as the second tip.

Preferably, the gear box further comprises a thin shaft, wherein the thin shaft is fixed at one end of the thick shaft, and the diameter of the thin shaft is equal to the diameter of a circle formed by the inner teeth.

Preferably, the fan blades are arranged outside the fan blade fixing sleeve.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the conversion spline ring is arranged, the fan blade can be fixedly locked in the thick shaft through the conversion spline ring, and compared with the case that the fan blade fixing sleeve is directly inserted into the thick shaft in a spline manner, the thick shaft is more uniformly stressed by using the conversion spline ring, and the situation of fracture caused by uneven stress of the thick shaft is avoided;

2. the tip ends are arranged on the external teeth and the internal teeth, so that the external teeth can be more conveniently inserted into the internal spline grooves, and the internal teeth can be more conveniently inserted into the external spline grooves.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the internal teeth of the present utility model;

FIG. 3 is a schematic view of a fan blade fixing sleeve according to the present utility model.

In the figure: 1. a fan blade fixing sleeve; 11. an inner spline groove; 2. a thick shaft; 21. an outer spline groove; 3. a thin shaft; 4. a conversion spline ring; 42. external teeth; 421. a first tip; 43. internal teeth; 431. a second tip.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 3, in an embodiment of the present utility model, a fan spindle structure includes a fan blade fixing sleeve 1, a coarse shaft 2 and a conversion spline ring 4, wherein fan blades are installed outside the fan blade fixing sleeve 1, an outer spline groove 21 is formed on the coarse shaft 2, internal teeth 43 matched with the outer spline groove 21 are formed inside the conversion spline ring 4, and then the internal teeth 43 on the conversion spline ring 4 can be inserted into the corresponding outer spline groove 21, so that the conversion spline ring 4 is locked on the coarse shaft 2;

with continued reference to fig. 1 and 3, an inner spline groove 11 is provided on the inner surface of the fan blade fixing sleeve 1, an external tooth 42 matching with the inner spline groove 11 is provided on the outer surface of the conversion spline ring 4, and then the fan blade fixing sleeve 1 can be fixed on the conversion spline ring 4 by inserting the external tooth 42 into the inner spline groove 11, and the fan blade fixing sleeve 1 can be locked in the coarse shaft 2 by the conversion spline ring 4, compared with the case that the fan blade fixing sleeve 1 is directly inserted into the coarse shaft 2 by spline, the coarse shaft 2 can be stressed more uniformly by using the conversion spline ring 4;

with reference to fig. 1 and 2, the first tip 421 is disposed at one end of the external teeth 42, so that the external teeth 42 can be more conveniently inserted into the internal spline groove, the second tip 431 is disposed at one end of the internal teeth 43 far from the first tip 421, so that the second tip 431 can more conveniently insert the internal teeth 43 into the internal spline groove 21;

as shown in fig. 1, the device further comprises a thin shaft 3, the thin shaft 3 is fixed at one end of the thick shaft 2, the diameter of the thin shaft 3 is equal to the diameter of a circle formed by the internal teeth 43, and then in an initial state, the conversion spline ring 4 can be inserted onto the thin shaft 3 first, after the fan blade fixing sleeve 1 is installed on the conversion spline ring 4, the conversion spline ring 4 can be rotated, so that the internal teeth 43 can correspond to the positions of the external spline grooves 21, and the installation is convenient. In the initial state, the conversion spline ring 4 can be inserted into the thin shaft 3 at first, then the inner spline groove 11 on the fan blade fixing sleeve 1 is aligned with the outer tooth 42 on the conversion spline ring 4, so that the fan blade fixing sleeve 1 can be conveniently installed on the conversion spline ring 4, and then the inner tooth 43 can correspond to the position of the outer spline groove 21 by rotating the conversion spline ring 4, so that the conversion spline ring 4 can be conveniently installed on the thick shaft 2; the first pointed end 421 is arranged at one end of the external teeth 42, so that the external teeth 42 can be more conveniently inserted into the internal spline groove, the second pointed end 431 is arranged at one end of the internal teeth 43 far away from the first pointed end 421, and the second pointed end 431 can enable the internal teeth 43 to be more conveniently inserted into the internal spline groove 21; the fan blade fixing sleeve 1 can be locked in the thick shaft 2 through the conversion spline ring 4, and compared with the mode that the fan blade fixing sleeve 1 is directly inserted into the thick shaft 2 through a spline, the thick shaft 2 can be stressed more uniformly through the conversion spline ring 4.

The working principle and the using flow of the utility model are as follows: when the device is used, in an initial state, the conversion spline ring 4 can be inserted into the thin shaft 3 at first, then the inner spline grooves 11 on the fan blade fixing sleeve 1 are aligned with the outer teeth 42 on the conversion spline ring 4, so that the fan blade fixing sleeve 1 can be conveniently installed on the conversion spline ring 4, and then the inner teeth 43 can correspond to the positions of the outer spline grooves 21 by rotating the conversion spline ring 4, so that the conversion spline ring 4 can be conveniently installed on the thick shaft 2;

the first pointed end 421 is arranged at one end of the external teeth 42, so that the external teeth 42 can be more conveniently inserted into the internal spline groove, the second pointed end 431 is arranged at one end of the internal teeth 43 far away from the first pointed end 421, and the second pointed end 431 can enable the internal teeth 43 to be more conveniently inserted into the internal spline groove 21;

the fan blade fixing sleeve 1 can be locked in the thick shaft 2 through the conversion spline ring 4, and compared with the mode that the fan blade fixing sleeve 1 is directly inserted into the thick shaft 2 through a spline, the thick shaft 2 can be stressed more uniformly through the conversion spline ring 4.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A fan main shaft structure which characterized in that: including flabellum fixed sleeve (1), thick axle (2) and conversion spline ring (4), outer spline groove (21) have been seted up on thick axle (2), on the inside of conversion spline ring (4) is equipped with outer spline groove (21) complex internal tooth (43), the internal surface of flabellum fixed sleeve (1) is equipped with interior spline groove (11), the surface of conversion spline ring (4) is equipped with interior spline groove (11) complex external tooth (42).

2. A fan spindle structure according to claim 1, wherein: one end of the external teeth (42) is provided with a first tip (421).

3. A fan spindle structure according to claim 2, wherein: the end of the internal teeth (43) remote from the first tip (421) is provided as a second tip (431).

4. A fan spindle structure according to claim 3, wherein: the gear further comprises a thin shaft (3), wherein the thin shaft (3) is fixed at one end of the thick shaft (2), and the diameter of the thin shaft (3) is equal to the diameter of a circle formed by the inner teeth (43).

5. The fan spindle structure of claim 4, wherein: the fan blade is arranged outside the fan blade fixing sleeve (1).