CN211525075U

CN211525075U - Sealed effectual roots's fan

Info

Publication number: CN211525075U
Application number: CN201922248916.XU
Authority: CN
Inventors: 张松旺; 任红强; 杜西亮
Original assignee: Zhoukou General Blower Co ltd
Current assignee: Zhoukou General Blower Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-09-18
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses a sealed effectual roots fan includes initiative rotor or driven rotor at least, be provided with mechanical seal spare between initiative rotor or driven rotor and the preceding wallboard, mechanical seal spare is including integrated integrative rotating ring, quiet ring and compensating mechanism, the outside cover of quiet ring is equipped with the flexible cover body, the flexible cover body is including two first sealing rings and the second sealing ring of connecting two first sealing rings around including. The utility model discloses a mechanical seal spare seals wallboard and impeller, simultaneously the utility model discloses the flexible sleeve body has been established to the outside cover of quiet ring, effectual promotion the utility model discloses a sealing performance, and the middle part of second sealing ring is provided with convex surface segmental arc outwards for the second sealing ring can produce radial deformation, consequently, can reduce granular dust to quiet ring following nature's influence, ensures sealed validity between rotating ring and the quiet ring, effectual extension mechanical seal's life cycle.

Description

Sealed effectual roots's fan

Technical Field

The utility model relates to a roots's fan specifically is a sealed effectual roots's fan.

Background

The conventional roots blower has a problem of gas leakage when delivering gas, thereby reducing the efficiency of the blower. Therefore, in order to prevent gas leakage, sealing devices are adopted between the wall plate and the impeller, in the prior art, a shallow tooth labyrinth and a comb tooth labyrinth are commonly adopted, a sealing bush is fixed on a rotor, a labyrinth formed by a bush tooth groove and a sealing inner hole has a sealing effect on gas, the labyrinth bush is generally made of metal materials, a large gap is reserved at the top end of the labyrinth for preventing the metal part from rubbing, and the structure has the defect of poor sealing performance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sealed effectual roots fan to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the Roots blower with good sealing effect at least comprises a driving rotor or a driven rotor, a front wall plate, a mechanical sealing element and a flexible sleeve body, wherein the mechanical sealing element is arranged between the driving rotor or the driven rotor and the front wall plate, the mechanical sealing element comprises a movable ring, a static ring and a compensating mechanism which are integrated into a whole, the flexible sleeve body is sleeved on the outer side of the static ring, and the flexible sleeve body comprises a front first sealing ring, a rear first sealing ring and a second sealing ring which is connected with the two first sealing rings.

As a further aspect of the present invention: the second sealing ring and the static ring are in interference fit.

As a further aspect of the present invention: and the middle part of the second sealing ring is provided with an arc-shaped section with an outward convex surface.

As a further aspect of the present invention: the cross section of the first sealing ring is circular, oval or rectangular.

As a further aspect of the present invention: the flexible sleeve body is made of rubber.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model abandons a plurality of defects brought by the traditional shallow tooth labyrinth and comb tooth labyrinth device, adopts the mechanical sealing element with better sealing effect to seal the wall plate and the impeller, more importantly, considering that granular dust and the like accumulated between the static ring and the front wall plate can influence the follow-up property of the static ring, the utility model is sleeved with the flexible sleeve body outside the static ring, the sealing performance of the utility model can be effectively improved through the two first sealing rings fixed at the two ends of the static ring, and a second sealing ring is arranged between the two first sealing rings, and the middle part of the second sealing ring is provided with an arc-shaped section with an outward convex surface, so that the second sealing ring can generate radial deformation, the influence of granular dust on the follow-up property of the static ring can be reduced, the effectiveness of sealing between the dynamic ring and the static ring is ensured, and the service cycle of mechanical sealing is effectively prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a roots blower with good sealing effect in a front view.

Fig. 2 is an enlarged schematic structural diagram of a point a in fig. 1 according to the present invention.

Fig. 3 is a schematic view of the overall structure of the mechanical sealing element of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, in an embodiment of the present invention, a roots blower with good sealing effect at least includes a driving rotor or driven rotor 100, a front wall board 200, a mechanical sealing element 300 and a flexible sleeve 400, the mechanical sealing element 300 is disposed between the driving rotor or driven rotor 100 and the front wall board 200, the mechanical sealing element 300 includes a movable ring 310, a stationary ring 320 and a compensating mechanism 330 which are integrated into a whole, the flexible sleeve 400 is sleeved outside the stationary ring 320, the flexible sleeve 400 is made of rubber, the flexible sleeve 400 includes a front first sealing ring 410 and a rear first sealing ring 410 and a second sealing ring 420 connecting the two first sealing rings 410, the second sealing ring 420 and the stationary ring 320 are in interference fit, an arc section 421 with a convex surface facing outward is disposed in the middle of the second sealing ring 420, the cross section of the first sealing ring 410 is in a circular shape, an oval shape, a rectangular shape or a polygonal shape in other forms, preferably, the first sealing ring 410 has a circular cross-section in this embodiment.

To sum up, the utility model abandons many defects brought by the traditional shallow tooth labyrinth and comb labyrinth device, the utility model adopts the mechanical sealing element 300 to seal the wall plate and the impeller, and more importantly, considering that granular dust and the like are accumulated between the static ring and the front wall plate and possibly affect the static ring followability, the utility model discloses the flexible sleeve body 400 is sleeved outside the static ring 320, the sealing performance of the utility model can be effectively improved through two first sealing rings 410 fixed at the two ends of the static ring 320, and the second sealing ring 420 is arranged between the two first sealing rings 410, and the middle part of the second sealing ring 420 is provided with the arc section 421 with the convex surface facing outwards, so that the second sealing ring 420 can generate radial deformation, therefore, the influence of the granular dust on the followability of the static ring 320 can be reduced, and the sealing effectiveness between the dynamic ring 310 and the static ring 320 is ensured, the service life of the mechanical seal is effectively prolonged.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a sealed effectual roots's fan which characterized in that: at least including initiative rotor or driven rotor (100), preceding wallboard (200), mechanical seal (300) and the flexible cover body (400), be provided with mechanical seal (300) between initiative rotor or driven rotor (100) and preceding wallboard (200), mechanical seal (300) are including integrated rotating ring (310), quiet ring (320) and compensation mechanism (330), the outside cover of quiet ring (320) is equipped with the flexible cover body (400), the second sealing ring (420) of two first sealing rings (410) and two first sealing rings (410) of connection around the flexible cover body (400) are including.

2. The roots blower with good sealing effect as claimed in claim 1, wherein: the second sealing ring (420) is in interference fit with the static ring (320).

3. The roots blower with good sealing effect as claimed in claim 1, wherein: the middle part of the second sealing ring (420) is provided with an arc-shaped section (421) with a convex surface facing outwards.

4. The roots blower with good sealing effect as claimed in claim 1, wherein: the cross section of the first sealing ring (410) is circular, oval or rectangular.

5. The roots blower with good sealing effect as claimed in claim 1, wherein: the flexible sleeve body (400) is made of rubber.