CN212536113U

CN212536113U - Single-stage centrifugal fan structure

Info

Publication number: CN212536113U
Application number: CN202020312265.6U
Authority: CN
Inventors: 肖红军
Original assignee: Foshan Guanggu Blower Co ltd
Current assignee: Foshan Guanggu Blower Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2021-02-12
Anticipated expiration: 2030-03-13

Abstract

The utility model discloses a single-stage centrifugal fan structure, wherein, the high-speed shaft is provided with a high-speed bearing seat, the right side of the high-speed shaft is provided with a shaft coupling, the impeller shaft is connected on the right side of the high-speed shaft through the shaft coupling, the impeller shaft is provided with an impeller bearing seat which supports the impeller shaft, the high-speed bearing seat is provided with a rolling bearing and a bearing installation cover matched with the rolling bearing for use, the rolling bearing is provided with a bearing inner ring, a rolling piece and a bearing outer ring, the middle part in the bearing installation cover is provided with a buffer groove, an annular elastic piece is installed in the buffer groove, the elastic piece and the side wall of the buffer groove are provided with a compression gap, the inner ring surface of the elastic piece is fixedly connected with a limiting ring connected with the bearing outer ring, the vibration pressure received by the transmission shaft and the, reduce the damage of fan transmission position, effectively reduce the maintenance rate of fan.

Description

Single-stage centrifugal fan structure

Technical Field

The utility model belongs to the technical field of the aerodynamic technology and specifically relates to a single-stage centrifugal fan structure is related to.

Background

The single-stage centrifugal fan is widely applied to systems such as industrial production, public facilities and the like, and belongs to key equipment of the core in all fields. The impeller is the most important part of the fan, is a key ring for converting the mechanical energy of the driving machine into gas potential energy, and is used for improving the pressure of gas to prepare for the subsequent flow. The market is now demanding more and more on single-stage centrifugal blowers, and therefore the demand for single-stage centrifugal blowers with high flow rates and high pressure ratios is becoming stronger and stronger.

Although the single-stage centrifugal fan with high flow rate and high pressure ratio has good output performance, the same generated vibration pressure has great loss to the single-stage centrifugal fan, and the damage of the transmission part of the single-stage centrifugal fan is a common equipment problem, such as the generation of cracks and bending deformation of a transmission shaft and an impeller shaft. Aiming at the faults of the single-stage centrifugal fan, the traditional maintenance method comprises surfacing, hot spraying, electric brush plating and the like, but has certain disadvantages: the thermal stress generated by repair welding at high temperature cannot be completely eliminated, so that the material is easy to damage, and the part is easy to break; the brush plating is limited by the thickness of the coating and is easy to peel off, although the methods have certain advantages and disadvantages, the methods can only be used as repairing means after damage, and the damage condition cannot be effectively avoided, so that a structure capable of enabling a transmission part of a single-stage centrifugal fan to effectively absorb vibration pressure is needed to reduce the maintenance rate of the transmission part of the single-stage centrifugal fan.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.

A single-stage centrifugal fan structure comprises a machine body, wherein an installation chamber is formed in the machine body, a speed increaser is installed on the left side of the installation chamber, a high-speed shaft is connected with a power output part at the right end of the speed increaser, high-speed bearing seats matched with the high-speed shaft are arranged at the left end and the right end of the high-speed shaft, the high-speed bearing seats are fixed in the installation chamber and support the high-speed shaft, a coupler and an impeller shaft are arranged on the right side of the high-speed shaft, the right side of the installation chamber is communicated with a connecting flange, an impeller cover is installed at the right end of the connecting flange through bolts, an impeller bearing seat which is consistent with the high-speed bearing seats is matched on the impeller shaft, the impeller bearing seat is fixed on the inner right side of the connecting flange and supports the impeller shaft, the right end of the impeller shaft, the outer side of the machine body is provided with a controller;

the utility model discloses a bearing installation cover, including bearing installation cover, cushion collar, bearing installation cover, cushion collar and bearing installation cover, the cushion collar is equipped with antifriction bearing, the bearing installation cover that uses with the antifriction bearing cooperation, antifriction bearing is equipped with the bearing inner race of cooperation high-speed shaft, is used for rolling piece, installs in the bearing installation cover middle part for the installation disc of installation bearing outer race, the installation disc is equipped with the dashpot, the dashpot is the circular.

Compared with the prior art, the beneficial effects of the utility model are that: the high-speed bearing seat, the impeller bearing seat and the coupler are used for absorbing the vibration pressure on the transmission shaft and the impeller shaft, so that the high-pressure resistance of the transmission shaft and the impeller shaft is improved, the damage to the transmission part of the fan is reduced, and the maintenance rate of the fan is effectively reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural sectional view of the middle and high speed bearing seat of the present invention.

Fig. 3 is a sectional view of the structure of the middle coupling of the present invention.

In the figure: the high-speed shaft-1, the impeller shaft-2, the high-speed bearing seat-3, the coupling-4, the impeller bearing seat-5, the machine body-11, the mounting chamber-12, the speed increaser-13, the connecting flange-14, the impeller cover-15, the impeller-16, the diffuser-17, the air sealer-18, the controller-19, the bearing mounting cover-31, the bearing inner ring-32, the bearing outer ring-33, the buffer groove-34, the rolling piece-35, the elastic piece-36, the compression gap-37, the limit ring-38, the bearing middle ring-39, the concave arc groove-310, the retainer-311, the left half coupling-41, the right half coupling-42, the shockproof groove-43 and the shockproof pad-44.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but 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 single-stage centrifugal fan structure includes a body 1, wherein an installation chamber 12 is formed in the body 1, a speed increaser 13 is installed on the left side of the installation chamber 12, a high-speed shaft 1 is connected to a power output portion at the right end of the speed increaser 13, high-speed bearing blocks 3 matched with the high-speed shaft are installed at the left and right ends of the high-speed shaft 1, the high-speed bearing blocks 3 are fixed in the installation chamber 12 to support the high-speed shaft 1, a coupler 4 and an impeller shaft 2 are installed on the right side of the high-speed shaft 1, the impeller shaft 2 is connected to the right side of the high-speed shaft 1 through the coupler 4, a connection flange 14 is communicated with the right side of the installation chamber 12, an impeller cover 15 is installed on the right end of the connection flange 14 through bolts, an impeller bearing seat 5 having a structure consistent, the right end of the impeller shaft 2 penetrates through an impeller cover 15 to be connected with an impeller 16, a diffuser 17 and an air sealer 18 for sealing the outside of the diffuser 17 and the back of the impeller 16 are installed in the impeller cover, a controller 19 is arranged on the outer side of the machine body 1, a rolling bearing and a bearing installation cover 31 matched with the rolling bearing are arranged on the high-speed bearing seat 3, the rolling bearing is provided with a bearing inner ring 32 matched with the high-speed shaft 1, a rolling piece 35 used for rolling and a bearing outer ring 33 installed on the bearing installation cover 31, the rolling piece 35 can adopt a ball or a roller, the middle part in the bearing installation cover 31 is an installation round surface for installing the bearing outer ring 33, the installation round surface is provided with a buffer groove 34, the buffer groove 34 is of a round ring structure, an annular elastic piece 36 is installed in the buffer groove 34, the elastic piece 36 adopts rubber with the hardness of 80 degrees, a compression gap 37 is arranged between, make elastic component 36 compressible in dashpot 34, the spacing ring 38 that the internal ring face fixedly connected with of elastic component 36 is connected with bearing inner race 33, spacing ring 38 internal ring face and bearing inner race 33 are transition fit, shaft coupling 4 is equipped with the left half coupling 41 of being connected with high-speed shaft 1, the right half coupling 42 of being connected with impeller shaft 2, pass through fixing bolt fixed connection between left half coupling 41 and the right half coupling 42, the right-hand member middle part of left half coupling 41 be equipped with shockproof groove 43, install the antivibration pad 44 in the shockproof groove 43, absorb the vibration pressure that transmission shaft 1, impeller shaft 3 received through high-speed bearing frame 3, impeller bearing frame 5, shaft coupling 4, improved the anti high pressure ability of transmission shaft 1, impeller shaft 2, reduce the damage of fan transmission position, effectively reduce the maintenance rate of fan.

Preferably, a bearing middle ring 39 is arranged between the bearing inner ring 32 and the bearing outer ring 33, rolling pieces 35 are arranged on the inner annular surface and the outer annular surface of the bearing middle ring 39, a retainer 311 for connecting the bearing inner ring 32, the bearing middle ring 39 and the bearing outer ring 33 is further arranged on the inner annular surface and the outer annular surface of the bearing middle ring 39, concave arc grooves 310 matched with the rolling pieces 35 are arranged on the outer annular surface of the bearing inner ring 32, the inner annular surface of the bearing middle ring 39, the outer annular surface of the bearing middle ring 39 and the inner annular surface of the bearing outer ring 33, multi-stage rolling is adopted, effective average friction force of the rolling bearing in a high-speed state is achieved, and partial excessive friction of the rolling pieces 35 is avoided from generating offset.

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.

Claims

1. The utility model provides a single-stage centrifugal fan structure, includes the organism, its characterized in that: an installation chamber is formed in the machine body, a speed increaser is installed on the left side of the installation chamber, a power output part on the right end of the speed increaser is connected with a high-speed shaft, the left and right ends of the high-speed shaft are provided with high-speed bearing seats matched with the high-speed shaft, the high-speed bearing seats are fixed in the installation chamber to support the high-speed shaft, the right side of the high-speed shaft is provided with a coupler and an impeller shaft, the impeller shaft is connected to the right side of the high-speed shaft through the coupler, the right side of the installation chamber is communicated with a connecting flange, the right end of the connecting flange is provided with an impeller cover through a bolt, the impeller shaft is matched with an impeller bearing seat with the structure consistent with that of the high-speed bearing seat, the impeller bearing seat is fixed at the inner right side of the connecting flange to support the impeller shaft, the right end of the impeller shaft penetrates through an impeller cover to be connected with an impeller, a diffuser and an air sealer for sealing the outside of the diffuser and the back of the impeller are installed in the impeller cover, and a controller is arranged on the outer side of the machine body;

2. A single stage centrifugal fan structure according to claim 1, wherein: the rolling piece adopts a ball or a roller.

3. A single stage centrifugal fan structure according to claim 2, wherein: the bearing comprises a bearing inner ring, a bearing middle ring, a bearing outer ring, a rolling piece, a retainer, a bearing inner ring, a bearing middle ring and a bearing outer ring, wherein the bearing middle ring is arranged between the bearing inner ring and the bearing outer ring, the rolling piece is arranged on the inner annular surface and the outer annular surface of the bearing middle ring, the retainer for connecting the bearing inner ring, the bearing middle ring and the bearing outer ring is further arranged on the inner annular surface and the outer annular surface of the bearing middle ring, and the concave arc grooves matched with the rolling piece are arranged on the outer annular surface of the bearing inner ring, the.

4. A single stage centrifugal fan structure according to claim 1, wherein: the elastic piece is made of rubber with the hardness of 80 degrees.

5. A single stage centrifugal fan structure according to claim 1, wherein: the coupling is provided with a left half coupling connected with the high-speed shaft and a right half coupling connected with the impeller shaft, the left half coupling and the right half coupling are fixedly connected through a fixing bolt, the middle part of the right end of the left half coupling is provided with a shockproof groove, and a shockproof pad is arranged in the shockproof groove.