CN215213998U

CN215213998U - Flat structure centrifugal fan

Info

Publication number: CN215213998U
Application number: CN202120790125.4U
Authority: CN
Inventors: 李博; 黄希; 宋立斌; 李光勇
Original assignee: Hangzhou Weiguang Electronic Co Ltd
Current assignee: Hangzhou Weiguang Electronic Co Ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-12-17
Anticipated expiration: 2031-04-16

Abstract

The utility model relates to a flat structure centrifugal fan. The problems that in the prior art, a centrifugal fan motor is high in height, large in installation occupied space and large in size, and airflow loss of an air inlet is increased are solved. The centrifugal fan comprises a shell, an impeller and a motor, the motor comprises a chassis and a fixed seat, the fixed seat comprises an outer sleeve, an inner sleeve ring is arranged at the center of the outer sleeve, a stator is arranged outside the outer sleeve, a rotating shaft is connected in the inner sleeve ring through a bearing, a rotor is arranged on the rotating shaft, the rotor comprises a rotor disc, a fixed head and a permanent magnet, a concave groove is formed in the center of the rotor disc, a through hole is formed in the center of the concave groove, the fixed head is installed in the concave groove and penetrates out of the through hole, and the rotating shaft is fixedly connected with the fixed head. The stator and the fixing head are nested inside and outside, the height of the rotor is reduced, the height of the whole motor is reduced, and the motor is of a flat structure, so that the volume of the motor occupying the space of the centrifugal fan is greatly reduced, and the loss of air flow at an air inlet of the centrifugal fan is reduced.

Description

Flat structure centrifugal fan

Technical Field

The utility model relates to a fan technical field especially relates to a flat structure centrifugal fan.

Background

The centrifugal fan is a core component of a commonly used heat exchange fan system of a plurality of products, is widely applied to various industries of industrial production, particularly to products in the field of air conditioners, is one of important core components of the heat exchange fan system, and has high requirements on ventilation efficiency. Centrifugal fan generally includes the shell, sets up impeller, the drive impeller pivoted motor in the shell, and general motor height is higher, and the installation occupation space volume is great in the shell, shelters from to the air intake formation great area, has increased the loss of centrifugal fan air intake air current. In addition, the motor is large in size, so that the centrifugal fan is large in overall size and is not convenient to utilize in products with compact structures.

Disclosure of Invention

The utility model discloses mainly solved among the prior art centrifugal fan motor height higher, the installation occupies centrifugal fan space bulky, has increased air intake air loss's problem, provides a flat structure centrifugal fan.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a flat structure centrifugal fan, includes the shell, sets up impeller, drive impeller pivoted motor in the shell, the motor includes the chassis and sets up the fixing base on the chassis, the fixing base includes one end open-ended outer sleeve, is provided with the inner race at the inside center of outer sleeve, is provided with the stator outside the outer sleeve, rotates through the bearing in the inner race to be connected with the pivot, is provided with the rotor in the pivot, the rotor includes rotor dish, fixed head and permanent magnet, and the central concave depression in the outside bottom of rotor dish is formed with the depressed groove, and the depressed groove is located on the outer race opening, has seted up the through-hole at the depressed groove center, the fixed head is installed in the depressed groove and is worn out outside the through-hole, pivot and fixed head fixed connection, the rotor disk cover is outside the stator, the permanent magnet is fixed on the inside wall rotor dish towards the stator.

The utility model discloses well motor adopts the flat type, the outer sleeve is the cup, rotor dish depressed slot and the fixed head of connection in the depressed slot can set up on outer telescopic opening, the stator is installed in the outer sleeve outside, the interference of stator to depressed slot and fixed head has been avoided, the stator is nested mutually outside and inside with fixed head formation, the height of rotor has been reduced, and then the height of whole motor has been reduced, the motor is flat structure, make the motor occupy the volume in centrifugal fan space and reduce greatly, the loss of centrifugal fan's air intake air current has been reduced.

As a preferable scheme of the above scheme, the height of the inner ferrule is lower than the height of the wall of the outer sleeve, an inner-contracting installation space is formed between the end surface of the inner ferrule and the end surface of the outer sleeve, the concave groove is abutted against the inner-contracting installation space, and the front end of the fixing head extends into the inner-contracting installation space to be fixed with the rotating shaft. The scheme adopts the height difference between the outer sleeve and the inner ring of the cylinder to form an inward-contracted installation space, the area of the concave groove is smaller than that of the opening of the outer sleeve, when the installation is carried out, the concave groove can be close to the opening of the outer sleeve, even part of the concave groove can extend into the inward-contracted installation space of the outer sleeve, the concave groove can not interfere with the inner ring, the installation space is further utilized, the front end part of the fixing head can extend into the inward-contracted installation space, the inward-contracted installation space can be utilized by the structure of the fixing part of the rotor and the rotating shaft, the installation height is further reduced, and the motor is flattened.

As a preferable scheme of the above scheme, a circle of fixing edge is arranged on the inner wall of the inner ring, two bearings are fixed in the inner ring, and the two bearings are respectively arranged on two sides of the fixing edge in a close fit manner. Two adjacent fixed edges of bearing set up in this scheme, and two bearings are to being close to, and the height that highly slightly is less than the inner race of two bearings after the installation, and this scheme has shortened the installation distance between two bearings, has reduced the height of fixing base to the height of whole motor has been reduced.

As a preferable scheme of the above scheme, a circle of concave edge is formed by recessing the inner side wall of the rotor disc close to the opening part, the permanent magnets comprise a plurality of permanent magnets, the permanent magnets are adjacently arranged in the concave edge, and one end of each permanent magnet abuts against the bottom surface of the concave edge. The rotor disc is basin-shaped and comprises a circle of side wall, a concave edge is formed in the side wall close to the opening part in a concave mode, the side wall is integrally formed into a first-stage step shape, the permanent magnets are a plurality of small square blocks, the permanent magnets are adjacently arranged and installed in the concave edge, the height of each permanent magnet is smaller than that of the concave edge, one end of each permanent magnet is abutted to the bottom surface of the concave edge, the other end of each permanent magnet is lower than the opening of the rotor disc, and the permanent magnets are bonded in the concave edge.

As an optimal scheme of above-mentioned scheme, the shell is including setting up the air intake on the both ends face, the motor sets up between two air intakes, and the motor passes through the installing support to be fixed mutually with the casing, and the installing support includes solid fixed ring and connects the linking arm of outside extension on solid fixed ring, and solid fixed ring is fixed mutually with the motor, and the linking arm stretches out the air intake and fixes on the shell. The motor passes through the linking arm suspension in the air inlet in this scheme, has reduced to fill by a percentage air intake space volume, has reduced the loss of centrifugal fan's air intake air current.

As a preferable scheme of the above scheme, the connecting arm includes two sections of horizontal connecting portions arranged in parallel, and an intermediate connecting portion connected between the two horizontal connecting portions, one end of the horizontal connecting portion is fixed to the motor, the other end of the horizontal connecting portion is fixed to the housing, and the intermediate connecting portion is inclined. This linking arm is the form of buckling in this scheme, and the linking arm includes parallel arrangement's horizontal connecting portion from top to bottom, connects intermediate junction portion between the horizontal connecting portion, and this intermediate junction portion is the slope form. The middle of this linking arm is the slope form and sets up, compares perpendicular form and stretches into in the shell air inlet can effectively reduce the radial force size that the linking arm received, reduces the impeller vibrations, has also reduced the mounting height simultaneously, can be so that the centrifugal fan shell does more flat.

As a preferable scheme of the scheme, an included angle of 8-30 degrees is formed between the middle connecting part and the horizontal connecting part. The included angle between the middle connecting part and the horizontal connecting part is adjusted between 10 degrees and 25 degrees.

As a preferable scheme of the above scheme, the connecting arms include three, and the three connecting arms are fixed on the connecting ring in a 120-degree distribution. The connecting arms are arranged in a 120-degree interval reflection mode, and the connecting structure is more stable.

Preferably, the connecting arm is made of a steel bar bent into a V shape, and the angle of divergence between the two ends of the steel bar is 0-12 degrees. The material is simple, and buckles into the V type, and the both ends of reinforcing bar are fixed on solid fixed ring, and the kink of reinforcing bar is located the shell, passes the kink through the bolt and fixes.

As a preferable scheme of the above scheme, an elastic sheet is arranged on the rotating shaft between the fixed head and the bearing. The elastic sheet in the scheme is formed by connecting two annular sheets, and two ends of the elastic sheet are respectively abutted to the bearing and the fixed head, so that the fixed head is prevented from moving towards the direction of the bearing, and the rotor disc is prevented from interfering with the outer sleeve.

The utility model has the advantages that: the motor adopts the flat type, the outer sleeve is the cup, rotor dish depressed slot and the fixed head of connection in the depressed slot can set up on outer telescopic opening, the stator is installed in the outer sleeve outside, avoided the stator to the interference of depressed slot and fixed head, the stator forms inside and outside mutually nestification with the fixed head, the height of rotor has been reduced, and then the height of whole motor has been reduced, the motor is flat structure, make the motor occupy the volume in centrifugal fan space and reduce greatly, the loss of centrifugal fan's air intake air current has been reduced.

Drawings

Fig. 1 is a schematic cross-sectional view of an electric motor according to the present invention;

fig. 2 is a schematic structural view of the present invention;

fig. 3 is a schematic structural diagram of the connecting arm of the present invention.

The method comprises the following steps of 1-a shell 2-a motor 3-a chassis 4-a fixed seat 5-an outer sleeve 6-an inner ring 7-a rotating shaft 8-a rotor disc 9-a fixed head 10-a permanent magnet 11-a concave groove 12-a fixed edge 13-a bearing 14-a concave edge 15-an air inlet 16-a fixed ring 17-a connecting arm 18-a horizontal part 19-a middle part 20-a spring plate.

Detailed Description

The technical solution of the present invention is further described below by way of examples and with reference to the accompanying drawings.

Example (b):

the centrifugal fan of the present embodiment has a flat structure, as shown in fig. 2, and includes a casing 1, an impeller disposed in the casing, and a motor 2 for driving the impeller to rotate. As shown in fig. 1, the motor includes a chassis 3 and a fixing base 4 disposed on the chassis, the fixing base includes an outer sleeve 5 with an opening at one end, an inner race 6 is disposed at the center of the inner portion of the outer sleeve, a stator is disposed at the outer side of the outer sleeve, a rotating shaft 7 is rotatably connected in the inner race through a bearing, and a rotor is disposed on the rotating shaft.

The height of the inner ring 6 is lower than that of the cylinder wall of the outer sleeve 5, and a retraction installation space is formed between the end surface of the inner ring and the end surface of the outer sleeve. The inner wall of the inner ring 6 is provided with a circle of fixed edge 12, two bearings 13 are fixed in the inner ring, and the two bearings are respectively clung to the two sides of the fixed edge. The two bearings are adjacently installed, the installation height is shortened, the inner ring is correspondingly arranged, and the outer sides of the two bearings are tightly close to openings at two ends of the inner ring after installation.

The rotor comprises a rotor disk 8, a fixed head 9 and a permanent magnet 10, a concave groove 11 is concavely formed in the bottom of the outer side of the rotor disk, a through hole is formed in the center of the concave groove, the fixed head is installed in the concave groove and penetrates out of the through hole, the rotating shaft is fixedly connected with the fixed head, an elastic sheet 20 is arranged on the rotating shaft between the fixed head and a bearing 13, the concave groove is abutted against an inner telescopic installation space, the front end of the fixed head extends into the inner telescopic installation space, the structure of the fixed part of the rotor and the rotating shaft can utilize the inner telescopic installation space, so that the concave groove can be abutted against the opening of an outer sleeve, even can partially extend into the inner telescopic installation space without interfering with an inner ferrule, the installation space is further utilized, the front end part of the fixed head can extend into the inner telescopic installation space, the structure of the fixed part of the rotor and the rotating shaft can utilize the inner telescopic installation space, and the installation height is further reduced, making the motor flat. The rotor disc is housed outside the stator and the permanent magnets 10 are fixed to the inner side wall of the rotor disc facing the stator. Specifically, a circle of concave edge 14 is formed by inwards recessing the opening part on the inner side wall of the rotor disc 8, the permanent magnets comprise a plurality of square permanent magnets, the permanent magnets are adjacently arranged in the concave edge, and one end of each permanent magnet is abutted against the bottom surface of the concave edge.

The shell is including setting up air intake 15 on the both ends face, and the motor sets up between two air intakes, and the motor passes through the installing support to be fixed mutually with the casing, and the installing support includes solid fixed ring 16 and connects the linking arm 17 of outside extension on solid fixed ring, and solid fixed ring is fixed mutually with the chassis of motor 2, and the linking arm stretches out the air intake and fixes on the shell.

As shown in fig. 3, the connecting arm 17 includes two parallel horizontal connecting portions 18, and an intermediate connecting portion 19 connected between the two horizontal connecting portions, one end of the horizontal connecting portion is fixed to the motor, and the other end of the horizontal connecting portion is fixed to the housing, and the intermediate connecting portion is inclined. The intermediate connecting portion 19 and the horizontal connecting portion 18 form an included angle of 20 degrees. Specifically, the connecting arm is made of a steel bar, the steel bar is bent into a V shape, two ends of the steel bar are bent into parallel horizontal connecting parts, and the middle of the steel bar is a middle connecting part so as to form an inclined shape. The angle of divergence between the two ends of the reinforcing bar is 10 degrees. The connecting arms include three, are the distribution of 120 degrees between three connecting arms and fix on solid fixed ring, and the connecting arm stretches out the air intake and fixes mutually through the bolt with the shell surface.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms rotor, stator, threading opening, cavity, drive shaft etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The utility model provides a flat structure centrifugal fan, includes the shell, sets up impeller, the drive impeller pivoted motor in the shell, its characterized in that: the motor includes chassis (3) and fixing base (4) of setting on the chassis, the fixing base includes one end open-ended outer sleeve (5), is provided with inner race (6) at the inside center of outer sleeve, is provided with the stator outside the outer sleeve, is connected with pivot (7) through the bearing rotation in the inner race, is provided with the rotor in the pivot, the rotor includes rotor dish (8), fixed head (9) and permanent magnet (10), and the concave recess is formed with depressed groove (11) in the outside bottom of rotor dish, and the depressed groove is located on outer race opening, has seted up the through-hole at the depressed groove center, the fixed head is installed in the depressed groove and is worn out outside the through-hole, pivot and fixed head fixed connection, the rotor disk cover is outside the stator, the permanent magnet is fixed on the inside wall of rotor dish towards the stator.

2. A centrifugal fan of flat structure as claimed in claim 1, wherein the height of said inner race (6) is lower than the height of the wall of said outer sleeve, a retracted installation space is formed between the end surface of the inner race and the end surface of the outer sleeve, said recessed groove is abutted against the retracted installation space, and the front end of the fixing head is extended into the retracted installation space to be fixed with the rotating shaft (7).

3. A centrifugal fan of flattened construction according to claim 1 or 2, characterised in that a ring of fixing rim (12) is provided on the inner wall of said inner ring (6), and that two bearings (13) are fixed in the inner ring, which bearings are arranged in abutment on either side of the fixing rim.

4. The centrifugal fan with flat structure as claimed in claim 1, wherein the inner side wall of the rotor disc (8) is recessed by an opening part to form a circle of concave edge (14), the permanent magnets (10) comprise a plurality of permanent magnets, the permanent magnets are adjacently arranged in the concave edge, and one end of the permanent magnet abuts against the bottom surface of the concave edge.

5. A flat centrifugal fan as claimed in claim 1, characterized in that the housing comprises air inlets (15) on both end faces, the motor is arranged between the two air inlets, the motor is fixed to the housing by a mounting bracket, the mounting bracket comprises a fixing ring (16) and a connecting arm (17) connected to the fixing ring and extending outwards, the fixing ring is fixed to the motor (2), and the connecting arm extends out of the air inlets and is fixed to the housing (1).

6. A centrifugal fan of flattened construction according to claim 5, wherein said connecting arm (17) comprises two parallel horizontal connecting portions (18), one end of which is fixed to the motor and the other end of which is fixed to the housing, and an intermediate connecting portion (19) connected between the two horizontal connecting portions, said intermediate connecting portion being inclined.

7. A flat centrifugal fan according to claim 6 wherein the intermediate connection (19) is angled at 8-30 degrees from the horizontal connection (18).

8. A centrifugal fan of flattened construction according to claim 5, characterised in that said connecting arms (17) comprise three, which are fixed to the fixing ring (16) in a 120 degree distribution.

9. A centrifugal fan of flattened construction according to any one of claims 5-8 wherein the connecting arms (17) are formed by bending steel bars into a V-shape with a divergent angle between the ends of the bars of 0-12 degrees.

10. A centrifugal fan of flat construction according to claim 3, characterized in that the shaft between the fixed head (9) and the bearing (13) is provided with a spring (20).