Circulating fan rotor

Abstract

The utility model relates to the technical field of fan rotors, and discloses a circulating fan rotor which comprises a rotating shaft and blades, the surface of the rotating shaft is sleeved with a flow guide sleeve in a sliding mode, the flow guide sleeve is fixedly connected with the rotating shaft through a first bolt, a plurality of blades are fixedly arranged on the periphery of the flow guide sleeve in an annular array mode, and a first step hole is formed in the end face of the flow guide sleeve. A counterweight hole is formed in the end face of the first stepped hole, the surface of the rotating shaft is slidably sleeved with a plugging disc, the plugging disc covers the first stepped hole, and the plugging disc is fixedly connected with the flow guide sleeve through a second bolt. According to the circulating fan rotor, the flow guide sleeve is arranged, the first stepped hole or the second stepped hole is formed in the flow guide sleeve, the counterweight holes are formed in different positions of the end faces of the stepped holes, the positions of mass centers of all micro-sections of the rotor are adjusted to be located on the axis of the rotating shaft, and dynamic balance correction is completed through weight removal; according to the rotor structure, clamping and repeated positioning of cutting machining are convenient, and the effect of conveniently correcting dynamic balance machining is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fan rotors, in particular to a circulating fan rotor. Background Art

[0002] The rotor is an important component part in a fan. A wind blade is connected to the rotor. The rotor of the circulating fan rotates at a relatively high speed, and the rotor is prone to unbalanced phenomena such as jitter, posing a great potential safety hazard. To solve this problem, the prior art with the publication number of CN204226291U discloses a dust-proof fan rotor, including a rotor body integrally formed by a metal material through one-time casting. Balancing devices are provided on the front end ring at the front part and the rear end ring at the rear part of the rotor body. Preferably, the balancing device is a plurality of balancing holes provided on the front end ring and the rear end ring and evenly distributed on the circumferential surfaces of the front and rear end rings. At the same time, balancing pins are installed in the balancing holes. The greatest advantage of the utility model is that the rotor can maintain a good sense of balance even when rotating at a relatively high speed, and has a simple structure and safe use.

[0003] In practical applications, the rotors of circulating fans are mostly blade type. For such rotors, the method of controlling the weight of each blade is often adopted to correct the dynamic balance of the rotor, which seriously affects the processing efficiency. Especially when the shape and dimensional tolerances of the blades are relatively strict, it is difficult to perform repeated processing during the process of correcting the dynamic balance. Based on this, the existing structure of the circulating fan rotor has the problem of difficulty in correcting the dynamic balance and needs to be further improved. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a circulating fan rotor to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A circulating fan rotor includes a rotating shaft and blades. A guiding sleeve is slidably sleeved on the surface of the rotating shaft. The guiding sleeve is fixedly connected to the rotating shaft through a first bolt. A plurality of blades are fixedly arranged in an annular array around the guiding sleeve. A first stepped hole is formed in the end face of the guiding sleeve, and a counterweight hole is formed in the end face of the first stepped hole. A blocking disk is slidably sleeved on the surface of the rotating shaft. The blocking disk covers the first stepped hole, and the blocking disk is fixedly connected to the guiding sleeve through a second bolt. Counterweight holes are formed at different positions on the end face of the stepped hole to adjust the positions of the mass centers of each micro-segment of the rotor to be located on the axis of the rotating shaft, and the dynamic balance correction is completed by weight removal.

[0006] In some embodiments, the outer surface of the guiding sleeve is in an arc surface structure, so that the two ends of the guiding sleeve are respectively a large end and a small end. A plurality of blades are arranged at the arc surface of the guiding sleeve. The guiding sleeve and the blades are of an integral structure. The outer surface of the guiding sleeve is in an arc shape, which increases the contact area between the blades and the guiding sleeve and improves the stability of the blades.

[0007] In some embodiments, a second stepped hole is provided at the end of the flow guide sleeve, so that a plurality of counterweight holes can be provided at different positions on the end face of the first stepped hole or the second stepped hole, improving the error tolerance. In the process of drilling the counterweight holes, the small end of the flow guide sleeve can be oriented downward and installed on the positioning tooling, achieving the effect of convenient installation and positioning.

[0008] In some embodiments, key grooves are provided on the inner hole of the flow guide sleeve and the surface of the rotating shaft, and positioning keys are inserted into the key grooves. A bolt hole is provided at the small end of the flow guide sleeve, and a threaded hole is provided at the end of the rotating shaft. The first bolt is threadedly installed in the threaded hole through the bolt hole.

[0009] In some embodiments, a plurality of pin holes are provided on the end face of the small end of the flow guide sleeve. A flow guide cap is provided on one side of the small end of the flow guide sleeve. The flow guide cap has a hemispherical structure. A plurality of positioning pins are fixedly installed at the end of the flow guide cap. The positioning pins can be tightly inserted into the pin holes, and the outer surface of the flow guide cap is smoothly transitioned with the arc surface of the flow guide sleeve.

[0010] In some embodiments, a guide sleeve is provided on the end face of the plugging disc. An annular groove is provided on the inner wall of the guide sleeve, and a sealing ring is provided in the annular groove. The plugging disc serves to seal the inner cavity of the flow guide sleeve.

[0011] Beneficial Effects

[0012] The present utility model provides a circulating fan rotor, having the following beneficial effects:

[0013] 1. For this circulating fan rotor, by providing a flow guide sleeve and providing a first stepped hole or a second stepped hole in the flow guide sleeve, and by providing counterweight holes at different positions on the end face of the stepped hole to adjust the position of the centroid of each micro-segment of the rotor to be located on the axis of the rotating shaft, dynamic balance correction is completed by weight removal. This rotor structure form is convenient for the clamping and repeated positioning of cutting processing, achieving the effect of convenient dynamic balance correction processing.

[0014] 2. For this circulating fan rotor, by providing a flow guide sleeve at the central position of each blade, and the outer surface of the flow guide sleeve has an arc-shaped structure, the contact area between the blade and the flow guide sleeve is increased, improving the stability of the blade. By installing a plugging disc at the large end of the flow guide sleeve, the plugging disc serves to seal the inner cavity of the flow guide sleeve, and the flow guide sleeve and the rotating shaft are fixedly connected by the first bolt, achieving the effect of convenient loading and unloading, providing convenience for assembly, and being more practical. Description of the Drawings

[0015] Figure 1 It is a three-dimensional structure diagram (one) of the present utility model;

[0016] Figure 2 It is a three-dimensional structure diagram (two) of the present utility model;

[0017] Figure 3 It is a schematic front-sectional structure diagram of the flow guide sleeve;

[0018] Figure 4 It is a schematic side-view structure diagram of the flow guide sleeve.

[0019] In the figure: 1 rotating shaft, 2 blades, 3 flow guide sleeve, 4 first bolt, 5 first stepped hole, 6 counterweight hole, 7 plugging disc, 8 second bolt, 9 second stepped hole, 10 positioning key, 11 threaded hole, 12 flow guide cap, 13 positioning pin, 14 pin hole, 15 guide sleeve, 16 sealing ring. Specific implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-4 , the present invention provides a technical solution: a circulating fan rotor, including a rotating shaft 1 and blades 2. A flow guide sleeve 3 is slidably sleeved on the surface of the rotating shaft 1. The flow guide sleeve 3 is fixedly connected to the rotating shaft 1 through a first bolt 4. A plurality of blades 2 are fixedly arranged in a circular array around the flow guide sleeve 3. The outer surface of the flow guide sleeve 3 is in an arc structure, so that both ends of the flow guide sleeve 3 are a large end and a small end respectively. A plurality of blades 2 are arranged at the arc surface of the flow guide sleeve 3.

[0022] In this embodiment, the flow guide sleeve 3 and the blades 2 are of an integral structure. The flow guide sleeve 3 is made of a whole piece of material. Each blade 2 structure is milled by a machining center. By arranging the flow guide sleeve 3 at the center position of each blade 2, and the outer surface of the flow guide sleeve 3 is in an arc structure, the contact area between the blade 2 and the flow guide sleeve 3 is increased, and the stability of the blade 2 is improved.

[0023] A first stepped hole 5 is opened on the end face of the flow guide sleeve 3, and a counterweight hole 6 is opened on the end face of the first stepped hole 5. A plugging disc 7 is slidably sleeved on the surface of the rotating shaft 1. The plugging disc 7 covers the first stepped hole 5, and the plugging disc 7 is fixedly connected to the flow guide sleeve 3 through a second bolt 8.

[0024] Key grooves are opened in the inner hole of the flow guide sleeve 3 and the surface of the rotating shaft 1, and a positioning key 10 is inserted into the key grooves. A bolt hole is opened at the small end of the flow guide sleeve 3, and a threaded hole 11 is opened at the end of the rotating shaft 1. The first bolt 4 passes through the bolt hole and is threadedly installed in the threaded hole 11. The flow guide sleeve 3 and the rotating shaft 1 are fixedly connected through the first bolt 4, achieving the effect of convenient loading and unloading and providing convenience for the assembly operation.

[0025] A plurality of pin holes 14 are formed in the small end face of the flow guide sleeve 3. A flow guide cap 12 is arranged on one side of the small end of the flow guide sleeve 3. The flow guide cap 12 is of a hemispherical structure. A plurality of positioning pins 13 are fixedly installed at the end of the flow guide cap 12. The positioning pins 13 can be tightly inserted into the pin holes 14. The outer surface of the flow guide cap 12 is smoothly transitioned with the arc surface of the flow guide sleeve 3.

[0026] As Figure 3 shown, a second stepped hole 9 is formed in the end of the flow guide sleeve 3. The first stepped hole 5 and the second stepped hole 9 are coaxially arranged, so that a plurality of counterweight holes 6 can be formed at different positions on the end face of the first stepped hole 5 or the second stepped hole 9 to improve the error tolerance. In the process of drilling the counterweight holes 6, the small end of the flow guide sleeve 3 can be directed downward and installed on the positioning tooling. The positioning tooling is also provided with positioning pins 13. The positioning pins 13 are inserted into the pin holes 14. Then, bolts are passed through the bolt holes of the flow guide sleeve 3 to fix and press the flow guide sleeve 3 on the positioning tooling. This clamping method is convenient for installation and repeated positioning, and provides convenience for correcting the dynamic balance by opening the counterweight holes 6 multiple times.

[0027] A guide sleeve 15 is arranged on the end face of the plugging disc 7. An annular groove is formed in the inner wall of the guide sleeve 15, and a sealing ring 16 is arranged in the annular groove. By installing the plugging disc 7 at the large end of the flow guide sleeve 3, the plugging disc 7 has the function of sealing the inner cavity of the flow guide sleeve 3.

[0028] For this circulating fan rotor, by arranging the flow guide sleeve 3 and providing the first stepped hole 5 or the second stepped hole 9 in the flow guide sleeve 3, and by forming counterweight holes 6 at different positions on the end face of the stepped hole, the positions of the mass centers of each micro-segment of the rotor are adjusted to be located on the axis of the rotating shaft 1, and the dynamic balance correction is completed by removing weights. This rotor structure form is convenient for the clamping and repeated positioning of machining by cutting, achieving the effect of facilitating the machining for correcting the dynamic balance.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circulating fan rotor, comprising a rotating shaft (1) and blades (2), characterized in that: The surface sliding sleeve of the rotating shaft (1) is provided with a guide sleeve (3), the guide sleeve (3) is fixedly connected to the rotating shaft (1) by a first bolt (4), a plurality of blades (2) are fixedly arranged in a ring-shaped array around the guide sleeve (3), a first step hole (5) is opened on the end surface of the guide sleeve (3), and a counterweight hole (6) is opened on the end surface of the first step hole (5), and the surface sliding sleeve of the rotating shaft (1) is provided with a blocking plate (7), the blocking plate (7) covers the first step hole (5), and the blocking plate (7) is fixedly connected to the guide sleeve (3) by a second bolt (8).

2. A circulating fan rotor according to claim 1, characterized in that: The outer surface of the guide sleeve (3) is in an arcuate structure, so that the two ends of the guide sleeve (3) are respectively a large end and a small end, and a plurality of blades (2) are arranged on the arcuate surface of the guide sleeve (3).

3. A circulating fan rotor according to claim 2, characterized in that: The guide sleeve (3) and the blade (2) are an integrated structure.

4. A circulating fan rotor according to claim 3, characterized in that: A second step hole (9) is provided at the end of the guide sleeve (3).

5. A circulating fan rotor according to claim 4, characterized in that: The inner hole of the guide sleeve (3) and the surface of the rotating shaft (1) are provided with key slots, and positioning keys (10) are inserted into the key slots.

6. A circulating fan rotor according to claim 5, characterized in that: A bolt hole is provided at the small end of the guide sleeve (3), a threaded hole (11) is provided at the end of the rotating shaft (1), and the first bolt (4) passes through the bolt hole and is threadedly installed in the threaded hole (11).

7. A circulating fan rotor according to any one of claims 1 to 6, characterized in that: The small end surface of the guide sleeve (3) is provided with a plurality of pin holes (14); a guide cap (12) is provided on one side of the small end of the guide sleeve (3); the guide cap (12) is of a hemispherical structure; a plurality of positioning pins (13) are fixedly mounted on the end of the guide cap (12); the positioning pins (13) can be tightly inserted into the pin holes (14); and the outer surface of the guide cap (12) and the arc surface of the guide sleeve (3) are smoothly transitioned.

8. A circulating fan rotor according to claim 7, characterized in that: The end surface of the blocking disk (7) is provided with a guide sleeve (15), the inner wall of the guide sleeve (15) is provided with an annular groove, and a sealing ring (16) is provided in the annular groove.

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