Welded impeller shaft disc

Abstract

The utility model discloses a welded impeller shaft disc, which relates to the technical field of fan impeller connecting pieces and comprises a shaft disc plate, a welding sleeve and a taper sleeve, a shaft disc hole is arranged on the shaft disc plate, the welding sleeve is arranged in the shaft disc hole, the taper sleeve is arranged in the welding sleeve, and an axial notch is arranged on the taper sleeve. The shaft disc hole is formed in any position of the shaft disc plate in the axial direction of the shaft disc plate. The outer side wall of the welding sleeve is cut down in the circumferential direction to form an annular opening so that the outer side wall of the welding sleeve can form a step-shaped structure. The utility model has the advantages that the relative position of the shaft disc plate and the shaft center can be randomly adjusted, the manufacture is simple, the shaft disc can be applied to fans with any structures, the shaft disc can adapt to shaft disc plates with different sizes of shaft disc holes, and the use limitation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fan impeller connectors, and more specifically, it relates to a welded impeller shaft disc. Background Art

[0002] With the increasingly fierce market competition, customers have higher and higher requirements for fan products, and put forward higher requirements for the efficiency of on-site maintenance. As the core component of the fan, the impeller has a long on-site disassembly and assembly time during the current maintenance process, which affects subsequent production.

[0003] Currently, the structure of the welded impeller shaft disc is usually a structure with straight holes and key grooves opened on the cast iron shaft disc plate. The main shaft is placed into the straight hole and fixed by bolts locked in the key groove. This structure is unique and cannot adjust the relative positions of the shaft disc plate and the axis according to the actual situation, and it is difficult to adapt to the shaft disc plates with different sizes of shaft disc holes, having great limitations in actual use.

[0004] Moreover, this existing structure basically adopts an interference fit method during installation, and the shaft disc needs to be heated before installation. However, there is no heating condition at the customer's installation site, making the installation of the impeller shaft disc inconvenient; or direct membrane pulling and disassembling is adopted, and this method is easy to damage the shaft head. This leads to extremely high requirements for on-site installation and maintenance, increasing after-sales costs, being unfavorable for on-site maintenance, and affecting work efficiency.

[0005] A Chinese utility model patent with the patent authorization announcement number of CN 201671875 U discloses a connector, especially a connector for the main shaft of a fan and an impeller. It has a shaft disc hole on the shaft disc, and a tapered sleeve is sleeved in the shaft disc hole. A notch is vertically opened on the tapered sleeve. A tapered sleeve is sleeved in the shaft disc hole, and the main shaft is installed in the tapered sleeve, bringing great convenience to the disassembly and assembly of the impeller.

[0006] Although this technical solution can facilitate disassembly and assembly by setting a tapered sleeve with a notch, it still cannot solve the problems in the prior art that it is difficult to adjust the relative positions of the shaft disc plate and the axis and it is difficult to adapt to the shaft disc plates with different sizes of shaft disc holes, still having relatively large limitations and being unfavorable for use in special occasions. Utility Model Content

[0007] Aiming at this problem in actual use, the purpose of the utility model is to propose a welded impeller shaft disc, in which the relative positions of the shaft disc plate and the axis can be adjusted arbitrarily, and it can adapt to the shaft disc plates with different sizes of shaft disc holes, reducing the use limitations. The specific solutions are as follows:

[0008] A welded impeller shaft disc, comprising a shaft disc plate, a welding sleeve and a tapered sleeve. There is a shaft disc hole on the shaft disc plate. The welding sleeve is installed in the shaft disc hole, and the tapered sleeve is arranged inside the welding sleeve. An axial notch is formed on the tapered sleeve. The welding sleeve is welded to the shaft disc plate. The shaft disc hole is axially formed at any position on the shaft disc plate along the axial direction of the shaft disc plate;

[0009] A circular opening is formed by cutting the outer side wall of the welding sleeve along its circumference, so that the outer side wall of the welding sleeve forms a stepped structure.

[0010] Furthermore, the welding points of the welding sleeve and the shaft disc plate are located at the contact positions between the two axial end faces of the shaft disc plate and the welding sleeve.

[0011] Furthermore, at least one diameter-expanding ring is fixed outside the circular opening.

[0012] Furthermore, the diameter-expanding rings are circumferentially connected to adjacent diameter-expanding rings or the welding sleeve through splines; and the diameter-expanding rings are axially connected to adjacent diameter-expanding rings or the welding sleeve through locking parts.

[0013] Furthermore, a stepped surface is formed on the outer circumference of the welding sleeve, and an annular limiting opening is axially formed on the stepped surface. One end of the diameter-expanding ring extends into the annular limiting opening.

[0014] Furthermore, it also includes reinforcing ribs. The reinforcing ribs are evenly distributed around the outer circumference of the welding disc, and each single reinforcing rib is respectively connected to the welding disc and the shaft disc plate.

[0015] Furthermore, an arc-shaped internal screw hole is axially formed on the inner wall of the welding sleeve, and an arc-shaped external screw hole is axially formed on the outer wall of the tapered sleeve. The internal screw hole and the external screw hole are correspondingly matched to form a complete screw hole, and a bolt is screwed into the screw hole.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) The shaft disc adopts a welded tapered sleeve structure, and the relative position between the shaft disc plate and the axis can be adjusted arbitrarily. It is simple to manufacture and can be used on fans of any structure, greatly improving the installation and maintenance efficiency;

[0018] (2) By setting the diameter-expanding ring, it is possible to adapt to shaft disc plates with shaft disc holes of different sizes, improving the applicability of the shaft disc, reducing the use limitations of the shaft disc, and being beneficial for use in special occasions. Description of the Drawings

[0019] Figure 1 It is the front view of Embodiment 1 in the present utility model;

[0020] Figure 2 It is the present utility model Figure 1 The sectional view taken along line A-A;

[0021] Figure 3 Exploded view under the perspective of the present utility model Figure 2 ;

[0022] Figure 4 Front view of Embodiment 2 in the present utility model

[0023] Figure 5 The present utility model Figure 3 Cross-sectional view taken along line B-B in the present utility model

[0024] Reference numerals: 1, shaft disc plate; 2, welding sleeve; 3, tapered sleeve; 4, shaft disc hole; 5, annular opening; 6, diameter-expanded ring; 7, stepped surface; 8, annular limiting opening; 9, reinforcing rib; 10, screw hole; 11, through hole; 12, connecting hole Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments

[0026] Embodiment 1

[0027] As Figures 1-3 shown, a welded impeller shaft disc includes a shaft disc plate 1, a welding sleeve 2, and a tapered sleeve 3. There is a shaft disc hole 4 on the shaft disc plate 1. The welding sleeve 2 is installed in the shaft disc hole 4. A tapered sleeve 3 is arranged inside the welding sleeve 2. The tapered sleeve 3 has an inner hole (not shown in the figure). An axial notch (not shown in the figure) is provided on the tapered sleeve 3. An arc-shaped inner screw hole is axially provided on the inner wall of the welding sleeve 2. An arc-shaped outer screw hole is axially provided on the outer wall of the tapered sleeve 3. The inner screw hole and the outer screw hole are correspondingly matched to form a complete screw hole 10. A bolt is placed in the complete screw hole 10. The bolt (not shown in the figure) is screwed into the screw hole 10. Preferably, three complete screw holes 10 are evenly arranged around the axis of the shaft disc plate 1. When connecting the main shaft, the main shaft is placed into the inner hole of the tapered sleeve 3, and the bolt presses the tapered sleeve 3 towards the shaft disc hole 4. Since an axial notch is provided on the tapered sleeve 3, the inner hole of the tapered sleeve 3 naturally shrinks and holds the main shaft tightly

[0028] In addition, an arc-shaped inner through hole is axially provided on the inner wall of the welding sleeve 2. An arc-shaped outer through hole is axially provided on the outer wall of the tapered sleeve 3. The inner through hole and the outer through hole are correspondingly matched to form a complete through hole 11. The through hole 11 is used as a disassembly hole. Preferably, two are provided. The two through holes 11 are evenly arranged around the axis of the shaft disc plate 1. The main shaft can be disassembled by inserting a pin into the disassembly hole

[0029] Among them, the welding sleeve 2 is welded to the shaft disc plate 1. And the welding points of the welding sleeve 2 and the shaft disc plate 1 are located at the contact positions between the end faces at both axial ends of the shaft disc plate 1 and the welding sleeve 2. Fixing by welding can adapt to the use of various fan shaft discs

[0030] In addition, for the welding structure formed by the shaft disc plate 1 and the welding sleeve 2, the thickness of the material can be increased or decreased according to the actual situation, that is, the thickness and radial dimensions of the shaft disc plate 1 and the welding sleeve 2 are increased and decreased to achieve the best effect of reducing the bearing load, so that the fan can run longer, more stably and reliably.

[0031] Since the welding taper sleeve structure is adopted during the installation of the main shaft, it can adapt to the axis center at any position. Therefore, the shaft disc hole 4 is axially opened on the shaft disc plate 1 at any position along the axis of the shaft disc plate 1, that is, the relative position between the shaft disc plate 1 and the axis center can be adjusted arbitrarily, and it can be used on fans of any structure, reducing the limitations of the shaft disc in actual use, being beneficial to use in special occasions, and improving the installation and maintenance efficiency; preferably, in this embodiment, the shaft disc hole 4 is opened at the center of the shaft disc plate 1.

[0032] An annular opening 5 is formed by cutting the outer side wall of the welding sleeve 2 along its circumference, so that the outer side wall of the welding sleeve 2 forms a stepped structure. The stepped structure is used to position the butt joint of the welding sleeve 2 and the shaft disc plate 1 for easy installation and fixation.

[0033] The welded impeller shaft disc further includes a reinforcing rib 9. The reinforcing ribs 9 are evenly distributed around the outer circumference of the welding disc, and each single reinforcing rib 9 is respectively connected to the welding disc and the shaft disc plate 1. Preferably, the reinforcing rib 9 is in the structure of a triangular plate. The setting of the reinforcing rib 9 can increase and enhance the overall strength and stiffness of the shaft disc.

[0034] Embodiment 2

[0035] The difference between this embodiment and the previous embodiment lies in that, as shown in Figures 4-5 At least one diameter-expanding ring 6 is fixed outside the annular opening 5. The outer diameter and inner diameter of every two adjacent diameter-expanding rings 6 are the same, so that the diameter-expanding rings 6 are sleeved on each other in sequence. Figures 4-5 It shows that two diameter-expanding rings 6 are fixed outside the annular opening 5. The setting of the diameter-expanding rings 6 can meet the use of the shaft disc plate 1 with shaft disc holes 4 of different diameters, improving the applicability.

[0036] Furthermore, the diameter-expanding ring 6 is circumferentially connected to the adjacent diameter-expanding ring 6 or the welding sleeve 2 through a spline; and the diameter-expanding ring 6 is axially connected to the adjacent diameter-expanding ring 6 or the welding sleeve 2 through a locking member. Preferably, the locking member can be a bolt.

[0037] In a possible embodiment, splines (not shown in the figure) are provided on both the outer wall and the inner wall of the diameter-expanding ring 6 along its circumferential direction, and the splines provided on the outer wall are adapted to those on the inner wall to achieve circumferential connection of every two adjacent diameter-expanding rings 6; an arc-shaped outer connection hole is axially formed on the outer wall of the diameter-expanding ring 6, and an arc-shaped inner connection hole is axially formed on the inner wall of the diameter-expanding ring 6. The inner connection holes and the outer connection holes on two adjacent diameter-expanding rings 6 are correspondingly matched to form a complete connection hole 12. In this way, the circumferential and axial fixation of the diameter-expanding ring 6 is achieved, and the structure is simple. By increasing or decreasing the number of diameter-expanding rings 6, the shaft disc plate 1 with a shaft disc hole 4 of different diameters can be adapted.

[0038] Further, a stepped surface 7 is formed on the outer periphery of the welding sleeve 2, and an annular limiting opening 8 is axially formed in the stepped surface 7 along the axial direction of the welding sleeve 2. One end of the diameter-expanding ring 6 extends into the annular limiting opening 8. The annular limiting opening 8 is used to limit the diameter-expanding ring 6 fixed on the welding sleeve 2 to improve the stability of the diameter-expanding ring 6 after fixation.

[0039] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A welded impeller shaft disc, comprising a shaft disc plate, a welding sleeve and a tapered sleeve, wherein the shaft disc plate has a shaft disc hole, the welding sleeve is installed in the shaft disc hole, the tapered sleeve is arranged in the welding sleeve, and an axial notch is opened on the tapered sleeve, characterized in that: The welding sleeve is welded to the shaft disc plate, and the shaft disc hole is opened at any position on the shaft disc plate along the axial direction of the shaft disc plate; The outer wall of the welding sleeve is cut along its circumference to form an annular opening, so that the outer wall of the welding sleeve forms a step-like structure.

2. The welded impeller shaft disk according to claim 1, characterized in that: The welding point between the welding sleeve and the shaft disc plate is located at the contact position between the two axial end surfaces of the shaft disc plate and the welding sleeve.

3. The welded impeller shaft disk according to claim 1, characterized in that: At least one diameter expansion ring is fixed outside the annular opening.

4. The welded impeller shaft disk according to claim 3, characterized in that: The diameter expansion ring is circumferentially connected to the adjacent diameter expansion ring or welding sleeve via a spline; and the diameter expansion ring is axially connected to the adjacent diameter expansion ring or welding sleeve via a locking piece.

5. The welded impeller shaft disk according to claim 3 or 4, characterized in that: A step surface is formed on the outer periphery of the welding sleeve, and an annular limiting opening is provided on the step surface along the axial direction of the welding sleeve, and one end of the diameter expansion ring extends into the annular limiting opening.

6. The welded impeller shaft disk according to claim 1, characterized in that: It also includes reinforcing ribs, which are evenly distributed around the outer circumference of the welding disk, and a single reinforcing rib connects the welding disk and the shaft disk plate respectively.

7. The welded impeller shaft disk according to claim 1, characterized in that: The inner wall of the welding sleeve is axially provided with an arc-shaped inner screw hole, and the outer wall of the cone sleeve is axially provided with an arc-shaped outer screw hole. The inner screw hole and the outer screw hole are matched to form a complete screw hole, and the bolt is screwed into the screw hole.

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