CN210978004U

CN210978004U - Balancing device for single-stage low-speed cantilever structure centrifugal blower and blower

Info

Publication number: CN210978004U
Application number: CN201921880628.XU
Authority: CN
Inventors: 刘永梅
Original assignee: CHANGSHA BLOWER CO LTD
Current assignee: CHANGSHA BLOWER CO LTD
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-07-10
Anticipated expiration: 2029-11-04

Abstract

The utility model discloses a balancing device for a centrifugal blower with a single-stage low-speed cantilever structure and a blower, which comprises a balancing disk seat; a mounting hole matched with a main shaft of the blower is formed in the middle of the balance disc seat; an annular slideway is formed on the surface of the balance disc seat along the circumferential direction; a baffle ring is convexly formed at the top of the annular slide way; a plurality of balance blocks matched with the annular slide way are arranged in the annular slide way, and a fixing structure is connected to each balance block; a feeding port matched with the balance block is formed on the baffle ring. The utility model realizes the calibration of the rotor balance by moving the position of the balance block; the fan does not need to be disassembled, and the balancing weight does not need to be welded on the impeller, so that the operation is convenient, and the repair time is short; the maintenance cost is saved for the client, and the overhaul time is strived for.

Description

Balancing device for single-stage low-speed cantilever structure centrifugal blower and blower

Technical Field

The utility model belongs to the field of machinery, especially, relate to a balancing unit and air-blower for single-stage low-speed cantilever structure centrifugal blower.

Background

The impeller of the single-stage low-speed cantilever structure centrifugal blower is arranged on the extension section of the main shaft outside the supporting bearing and the thrust bearing, the impeller is arranged in the stator part, the rotating speed of the blower is 2980r/min, and the dynamic balance precision requirement of the rotor of the blower is very high. In the operation process of the blower, dust is accumulated on the impeller part, residual stress of welding of the impeller is released, and the dynamic balance of a rotor subjected to factory calibration is gradually destroyed, so that a user needs to disassemble the rotor of the blower at intervals and send the rotor of the blower to a factory or a professional factory for dynamic balance, and the dynamic balance of the rotor is recalibrated more frequently for the blower for conveying coal gas or other high-dust-content media. The rotor of the fan is disassembled to carry out dynamic balance, the disassembly and assembly process is complex to operate, and the repair period is long.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model discloses a balancing unit and air-blower for single-stage low-speed cantilever structure centrifugal air-blower. The utility model realizes the calibration of the rotor balance by moving the position of the balance block; the fan does not need to be disassembled, and the balancing weight does not need to be welded on the impeller, so that the operation is convenient, and the repair time is short; the maintenance cost is saved for the client, and the overhaul time is strived for.

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

a balancing device for a single-stage low-speed cantilever structure centrifugal blower comprises a balancing disk seat 8; a mounting hole 11 matched with the main shaft 4 of the blower is formed in the middle of the balance disc seat 8; an annular slideway 12 is formed on the surface of the balance disc seat 8 along the circumferential direction; a baffle ring 13 is convexly formed at the top of the annular slide way 12; a plurality of balance blocks 9 matched with the annular slide way 12 are arranged in the annular slide way 12, and the balance blocks 9 are connected with a fixed structure; the baffle ring 13 is provided with a feeding port 15 matched with the balance weight 9.

In a further improvement, the section of the annular slideway 12 is trapezoidal; the retaining ring 13 is the inclined side of the annular chute 12.

In a further improvement, the cross section of the annular slideway 12 is T-shaped.

In a further improvement, the fixing structure is a set screw 10 or a bolt which is in threaded connection with the balance weight 9; the balance weight 9 is formed with a threaded hole 14.

A blower is provided with the balancing device for the single-stage low-speed cantilever structure centrifugal blower.

In a further improvement, a main shaft 4 of the blower is provided with a blower impeller 2, and a casing 1 is arranged outside the main shaft 4 and the blower impeller 2; two ends of the main shaft 4 are respectively connected with the machine shell 1 through a first supporting bearing 3 and a second supporting bearing 5; the main shaft 4 is also connected with a coupling 7; the balancing device 6 for the single stage low speed cantilever construction centrifugal blower is mounted between the coupling 7 and the second support bearing 5.

Drawings

FIG. 1 is a front view of a balancer device;

FIG. 2 is a schematic side view of a balancing apparatus;

FIG. 3 is a side cross-sectional view of a weight;

FIG. 4 is a schematic side view of the balancing apparatus;

fig. 5 is a schematic structural view of the blower.

Detailed Description

Example 1

As shown in fig. 1-3 and 5, the blower impeller 2, the first support bearing 3, the second support bearing 5 are installed on the main shaft 4, the impeller 2 works in the casing 1, and the balance device 6 is added between the second support bearing 5 and the coupling 7. Wherein the balancing device 6 (see fig. 2) comprises a balancing disk seat 8, a balancing block 9 and a set screw 10.

The principle is as follows: the balance device is designed on the shaft of the blower and consists of a balance disc seat, a balance block and a set screw. The balance disc seat is a disc, an annular trapezoidal sliding groove is machined in the circumferential direction of the surface of the balance disc seat, the balance blocks are trapezoidal sliding blocks, threaded holes are drilled in the middle of the balance blocks, 4-6 identical balance blocks are designed for each balance device, and the balance blocks are uniformly installed in the trapezoidal sliding grooves of the balance disc seat and are positioned by using set screws when the air blower leaves a factory. After the blower operates for a certain time, the dynamic balance of the rotor fails, the mechanical vibration of the blower is intensified, the blower cannot operate normally, and at the moment, the rotor is subjected to dynamic balance calibration through the balancing device. Loosening holding screw, moving the position control dynamic balance volume of balancing piece, simple structure need not dismantle fan rotor, and dynamic balance can be accomplished to the position of adjustment balancing weight, convenient operation reduces the repair time.

Example 2

The annular trapezoidal sliding groove can be obviously replaced by a structure which can clamp the balance block, such as a T-shaped sliding groove, as shown in fig. 4.

While the embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the description and embodiments, but is capable of being applied in all kinds of fields adapted to the invention, and further modifications may readily be made by those skilled in the art, and the invention is therefore not limited to the details given herein and to the illustrations described and illustrated herein, without departing from the general concepts defined by the claims and their equivalents.

Claims

1. A balancing device for single-stage low-speed cantilever-structured centrifugal blowers, characterized by comprising a balancing disk seat (8); a mounting hole (11) matched with the main shaft (4) of the blower is formed in the middle of the balance disc seat (8); an annular slideway (12) is formed on the surface of the balance disc seat (8) along the circumferential direction; a baffle ring (13) is convexly formed at the top of the annular slide way (12); a plurality of balance blocks (9) matched with the annular slide way (12) are arranged in the annular slide way (12), and a fixed structure is connected to each balance block (9); a feeding port (15) matched with the balance block (9) is formed on the baffle ring (13).

2. The balancing apparatus for single stage, low speed cantilever-structured centrifugal blowers according to claim 1, wherein the annular ramp (12) is trapezoidal in cross-section; the baffle ring (13) is an inclined side edge of the annular slide way (12).

3. The balancing apparatus for single stage, low speed cantilever-structured centrifugal blowers according to claim 1, wherein the annular ramp (12) is T-shaped in cross-section.

4. The balancing apparatus for single stage low speed cantilever-structured centrifugal blowers according to claim 1, wherein the fixing structure is a set screw (10) or bolt screwed on the balance weight (9); the balance weight (9) is provided with a threaded hole (14).

5. A blower equipped with the balancing apparatus for a single stage low speed cantilever construction centrifugal blower of any one of claims 1 to 4.

6. The blower according to claim 5, characterized in that a blower impeller (2) is mounted on a main shaft (4) of the blower, and a casing (1) is mounted outside the main shaft (4) and the blower impeller (2); two ends of the main shaft (4) are respectively connected with the machine shell (1) through a first supporting bearing (3) and a second supporting bearing (5); the main shaft (4) is also connected with a coupling (7); the balancing device (6) for the single-stage low-speed cantilever structure centrifugal blower is arranged between the coupling (7) and the second support bearing (5).