CN217558582U - Centrifugal fan - Google Patents

Abstract

The utility model discloses a centrifugal fan has solved current centrifugal fan's drive arrangement and has passed through the direct and spiral case contact of flexible connection structure, and the higher flexible connection structure that leads to of spiral case during operation heat is yielding technical problem easily, and its technical scheme is a centrifugal fan, including the spiral case, set up the wind wheel in the spiral case and set up the drive arrangement who is used for driving the wind wheel outside the spiral case, drive arrangement includes the mounting bracket, install thermal-insulated frame on the spiral case, thermal-insulated frame sets up with spiral case surface is built on stilts, the mounting bracket with thermal-insulated frame is fixed mutually through two at least flexible connection structures, has reached thermal-insulated frame and spiral case surface and has built on stilts the setting, has avoided direct thermal contact, has effectively got to increase flexible connection structure's life-span to the stability in use of motor has been strengthened.

Description

Centrifugal fan

Technical Field

The utility model relates to a centrifugal fan.

Background

The fan all needs motor drive to drive, to centrifugal fan, has to set up driving motor inside the spiral case, also has to set up driving motor on the spiral case, no matter which kind of fixed mode, all needs to be connected with the spiral case, but because the motor rotates can produce vibrations and noise to can transmit spiral case department, vibrations and noise can be enlarged, and influence the smooth operation of fan.

In order to solve the technical problem, CN212959157U discloses a centrifugal fan, in which a motor is in flexible connection with a volute casing, but the flexible connection is achieved by a rubber part, but in an actual use process, because the temperature of the surface of the volute casing is high, the rubber part is directly arranged on the surface of the volute casing, so that the rubber part is easily aged and cracked rapidly, and further the installation position of the motor is misaligned, and the axis of the fan deviates, which affects the operation of the fan.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an avoid the direct thermal contact with the spiral case of flexible connection structure, effectively must increase the centrifugal fan of flexible connection structure's life-span.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a centrifugal fan, includes the spiral case, sets up the wind wheel in the spiral case and sets up the drive arrangement who is used for driving the wind wheel outside the spiral case, drive arrangement includes the mounting bracket, install thermal-insulated frame on the spiral case, thermal-insulated frame and the built on stilts setting of spiral case surface, the mounting bracket with thermal-insulated frame is fixed mutually through two at least flexible connection structure.

Further, the heat insulation frame is an integrated heat insulation frame.

Further, the quantity of thermal-insulated frame with the quantity phase-match of flexible connection structure, every thermal-insulated frame all include with the fixed link of flexible connection structure and with the stiff end of spiral case.

Furthermore, the connecting end is arranged in the center of the heat insulation frame, and the fixed end is arranged on two sides of the heat insulation frame.

Further, the both sides of link are provided with strengthens the concave strip, the both sides stiff end of thermal-insulated frame all overlaps with the fixed end of adjacent thermal-insulated frame mutually.

Furthermore, the flexible connection structure comprises a positioning structure fixedly installed on the heat insulation frame, a shock absorption ring is sleeved on the outer side of the positioning structure, and a matching end fixed with the positioning structure is arranged on the heat insulation frame.

Furthermore, the positioning structure is a positioning column, a second annular groove is formed in the outer side face of the positioning column, and a clamping ring embedded into the second annular groove is arranged on the inner side of the damping ring.

Furthermore, a third annular groove is formed in the position, extending out of the shock absorption ring, of the top end of the positioning column, a gasket is arranged in the third annular groove, the lower end face of the gasket is used for being abutted to the top end of the shock absorption ring, a clamping ring is arranged above the gasket, and a hollow shock absorption cavity is formed in the inner side of the shock absorption ring.

Furthermore, the positioning column is fixed on the heat insulation frame in a riveting mode.

By adopting the technical scheme, the utility model discloses following beneficial effect has:

1. the soft connection structure is arranged on the heat insulation frame to replace the original requirement of contacting with the surface of the volute, and the heat insulation frame is arranged in an overhead way with the outer surface of the volute, so that direct thermal contact is avoided, the service life of the soft connection structure is effectively prolonged, and the stability of the motor is ensured;

2. the number of the heat insulation frames is matched with the number of the soft connection structures, and the heat insulation frames are uniformly and fixedly connected with the adjacent heat insulation frames, so that on one hand, the heat insulation frames play a role in generalization, and on the other hand, compared with the integrated forming, the material is saved;

3. the heat insulation is additionally provided with the reinforcing concave strip, so that the integral structure can be reinforced;

4. the driving motor is in flexible connection contact with the volute, so that the vibration and noise of the motor during operation can be eliminated;

5. the positioning column is provided with a second annular groove, the shock pad is matched with the second annular groove to realize clamping, and a third annular groove is arranged at the top of the positioning column, so that the shock pad on the outer side of the positioning column is firmly fixed, and dislocation in the operation process is avoided;

6. a hollow damping cavity is arranged in the damping ring, so that vibration can be decomposed in the damping cavity.

Drawings

FIG. 1 is a perspective view of a centrifugal fan;

FIG. 2 is a schematic perspective view of the other side of the centrifugal fan;

FIG. 3 is an exploded view of the drive assembly and volute;

FIG. 4 is an exploded view of the drive mechanism and the heat shield;

FIG. 5 is a horizontal schematic view of a centrifugal fan;

FIG. 6 is a schematic view of the flexible connection structure in cooperation with the mounting frame and the heat insulation frame;

fig. 7 is a sectional view of the flexible connection structure.

Reference numerals are as follows: 1. a volute; 11. an air inlet; 12. an air outlet; 2. a wind wheel; 3. a drive device; 31. a mounting frame; 32. a mating end; 321. an annular positioning ring; 4. a heat insulation frame; 41. a connecting end; 42. a fixed end; 43. reinforcing the concave strips; 5. a flexible connection structure; 51. a positioning column; 52. a shock-absorbing ring; 521. a position clamping ring; 522. a damping chamber; 523. a first annular groove; 53. A second annular groove; 54. a third annular groove; 6. a gasket; 61. a snap ring; 7. an overhead space.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a centrifugal fan includes a volute 1, the volute 1 is formed with an air inlet 11 and an air outlet 12, and a fan disposed in the volute 1, the air inlet 11 is disposed at an axial end of the fan, the air outlet 12 is disposed at a radial end of the fan, and air is blown out from the air outlet 12 after entering from the air inlet 11. The fan further comprises a driving device 3 for driving the fan to rotate, wherein the driving device 3 is driven by a motor and is arranged on the outer side of the volute 1 in the embodiment. Because vibrations can be generated in the process of driving the motor, once the vibrations are transmitted to the volute 1 and the fan, the fan can be unstable in rotation, noise is increased, and the air output is influenced. Therefore, the hard connection mode commonly used before is changed between the motor and the volute 1, namely, the fixed connection of the screw climbing and the like, but the soft connection structure 5 is adopted for connection, and the soft connection structure 5 can effectively counteract the vibration, however, the soft connection structure 5 generally adopts silica gel, and the soft connection structure 5 is directly contacted with the surface of the volute 1, so that the surface temperature of the volute 1 is very high in the working state, and the silica gel is contacted with the surface of the volute 1 for a long time, the heating and aging of a rubber part are easy to generate, so that the rubber part is deformed and cracked, the positioning deviation occurs at the soft connection part, and the operation stability of the whole fan is influenced.

Therefore, the soft connection structure 5 is directly connected with the volute 1 instead of being indirectly connected, and heat cannot be directly transferred to the rubber material, so that the service life of the rubber material is effectively prolonged on the premise that the damping effect of the soft connection structure 5 is ensured.

With reference to fig. 3 and 4, specifically, the driving device 3 includes a mounting bracket 31, as a hard connection mode of a general motor, only a screw hole needs to be provided on a motor housing, and since the space required by the flexible connection structure 5 is large, a mounting bracket 31 with a large area needs to be added in general, and of course, a part that is directly formed integrally on the motor housing can also be directly formed integrally. The mounting frame 31 acts as a fixed frame, i.e. one end of the flexible connecting structure 5 is connected to the mounting frame 31, so that a connection to the motor end is obtained.

The other end is connected, the soft connection structure 5 is not directly connected to the volute casing 1, the heat insulation frame 4 is independently added, the soft connection structure 5 is connected with the heat insulation frame 4, so that the direct connection between the soft connection structure 5 and the volute casing 1 is avoided, the heat insulation frame 4 and the volute casing 1 are in overhead indirect contact, the direct contact is changed into indirect contact, the overhead arrangement better plays a role in blocking heat transfer, the overhead space 7 provides a space for air flowing and heat dissipation in the running process of the fan, and the service life of the soft connection structure 5 is prolonged.

Since the flexible connection structures 5 on the mounting frame 31 are uniformly arranged, that is, three, four or five positions can be provided, the heat insulation frame 4 can be a corresponding polygon or a circle, and then the corresponding flexible connection structures 5 can be on the path of the heat insulation frame 4.

As an embodiment of this embodiment, the heat insulation frame 4 may be integrally provided (not shown), that is, an integral heat insulation frame 4 component is raised and raised upwards at a position fixed with the flexible connection structure 5, and may contact with the scroll casing 1 at a small fixed position to facilitate connection by screws and the like.

Referring to fig. 3 and 4, as another embodiment of this embodiment, the heat insulation frame 4 may be formed by a plurality of parts, the number of the parts may correspond to the number of the flexible connection structures 5, that is, if the number of the flexible connection structures 5 is three, the number of the heat insulation frames 4 is also three, and the shape and size of each heat insulation frame 4 are equal, so that not only the parts are generalized, but also the cost advantage is provided compared with the integrated heat insulation frame 4, which can avoid the waste of unnecessary materials, for example, the integrated heat insulation frame 4 needs to cut the middle material, which wastes the material cost. When the number of the soft connection structures 5 is three, the number of the heat insulation frames 4 is three, each heat insulation frame 4 is arc-shaped, and the three heat insulation frames 4 are connected to form a circular shape.

Referring to fig. 5 and 6, as mentioned above, the thermal insulation frame 4 specifically includes the connecting end 41 fixed to the flexible connecting structure 5 and the fixed end 42 of the spiral casing 1, wherein under the action of the thermal insulation frame 4, the connecting end 41 is disposed in an overhead manner, i.e. spaced from the spiral casing 1, so as to ensure the thermal insulation effect, wherein the connecting end 41 is preferentially disposed at the central position of the thermal insulation frame 4, so as to achieve a larger overhead space. Further, the fixing ends 42 are disposed at both ends of the heat insulation frame 4, and the fixing ends 42 are used for contacting with the scroll casing 1, thereby functioning as an intermediate connecting member of the heat insulation frame 4 and also functioning as an overhead connecting end 41.

When the thermal insulation frame is installed, the head end of one thermal insulation frame 4 corresponds to the tail end of the adjacent thermal insulation frame 4, the two thermal insulation frames 4 and the volute 1 are connected by bolts, so that the three circular thermal insulation frames 4 can be enclosed to form a circle, and the connecting end 41 can be arranged on the circular track.

Referring to fig. 7, in particular, the flexible connecting structure 5 includes a positioning structure disposed on the heat insulating frame 4, a shock absorbing ring 52 is sleeved outside the positioning structure, a mating end 32 matched with the shock absorbing ring 52 is disposed on the heat insulating frame 4, and the mating end 32 is formed as a mating hole in the present embodiment. The damping ring 52 is preferably a high temperature resistant silica gel pad, which can achieve damping in a high temperature environment.

As another embodiment of the present embodiment, the positioning structure is a cylindrical positioning column 51, similarly, a plurality of positioning columns 51 are provided, and one positioning column 51 is provided on each heat insulation frame 4 matching with the heat insulation frame 4, and in the case of three heat insulation frames 4 of the present embodiment, three positioning columns are provided, and are all provided on a circular track with the motor shaft as a center. One end of the positioning post 51 is fixed by caulking, but may be fixed by other methods.

Referring to the drawings, the shock-absorbing ring 52 is also cylindrical and is used for being sleeved on the outer surface of the positioning column 51, a first annular groove 523 is arranged on the outer side surface of the upper end of the shock-absorbing ring 52, a matching hole is arranged on the matching end 32, an annular positioning ring 321 matched with the first annular groove 523 is arranged on the inner wall of the matching hole in an inward extending mode, and by being arranged at the upper end of the shock-absorbing ring 52, on one hand, more shock-absorbing spaces with shock absorption allowance can be formed, and on the other hand, the matching end 32 and the shock-absorbing ring 52 can be matched and fixed.

A third annular groove 54 is formed in the position, extending out of the damping ring 52, of the top end of the positioning column 51, a gasket 6 is arranged in the third annular groove 54, the lower end face of the gasket 6 is used for abutting against the top end of the damping ring 52 and limiting the upper end of the damping ring 52 to limit the upper end of the damping ring 52, a clamping ring 61 is further mounted at the upper end of the gasket 6, and the clamping ring 61 with a gap is used for preventing the gasket 6 from falling off, so that the upper end is limited to be firmer.

A second annular groove 53 is formed on the outer circumferential surface of the positioning post 51, the second annular groove 53 is preferably formed near the lower end of the scroll casing 1, and a locking ring 521 for fitting the second annular groove 53 is also formed on the damper ring 52. So that the damping ring 52 and the positioning column 51 can be limited at the lower end.

The positioning column 51 is provided with a second annular groove 53, the damping ring 52 is matched with the second annular groove 53 to realize clamping, and the third annular groove 54 is arranged at the top of the positioning column 51, so that the damping ring 52 on the outer side of the positioning column 51 is firmly fixed, and dislocation in the operation process is avoided.

Furthermore, a hollow damping cavity 522 is formed inside the damping ring 52, and the hollow damping cavity 522 is formed inside the damping ring 52, so that vibration can be decomposed in the damping cavity 522, and a better damping effect is achieved.

Furthermore, the use of ordinal numbers such as "first," "second," "third," etc., in the specification and claims to modify a corresponding element is not intended to imply any ordinal numbers for the element, nor the order in which an element is sequenced or methods of manufacture, but are used to distinguish one element having a certain name from another element having a same name.

It should be noted that throughout the drawings, like elements are represented by like or similar reference numerals. In the following description, some specific embodiments are for illustrative purposes only and should not be construed as limiting the present invention in any way, but merely as exemplifications of embodiments of the invention. Conventional structures or constructions will be omitted when they may obscure the understanding of the present invention. It should be noted that the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present invention.

The specific embodiments are only for explaining the present invention, and it is not a limitation to the present invention, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a centrifugal fan, its characterized in that, includes spiral case (1), sets up wind wheel (2) in spiral case (1) and sets up drive arrangement (3) that are used for driving wind wheel (2) in spiral case (1) outside, drive arrangement (3) include mounting bracket (31), install thermal-insulated frame (4) on spiral case (1), thermal-insulated frame (4) and the built on stilts setting of surface of spiral case (1), mounting bracket (31) with thermal-insulated frame (4) are fixed mutually through two at least soft connection structure (5).

2. The centrifugal fan according to claim 1, wherein the heat insulating frame (4) is a one-piece heat insulating frame (4).

3. The centrifugal fan according to claim 1, wherein the number of the heat insulation frames (4) matches the number of the soft connection structures (5), and each heat insulation frame (4) comprises a connection end (41) fixed with the soft connection structure (5) and a fixed end (42) fixed with the volute (1).

4. The centrifugal fan according to claim 3, wherein the connection end (41) is arranged in the center of the thermally insulating frame (4) and the fixed end (42) is arranged on both sides of the thermally insulating frame (4).

5. The centrifugal fan according to claim 4, wherein reinforcing concave strips (43) are arranged on both sides of the connecting end (41), and both side fixing ends (42) of the heat insulation frame (4) are overlapped with the fixing end (42) of the adjacent heat insulation frame (4).

6. The centrifugal fan according to claim 1, wherein the flexible connection structure (5) comprises a positioning structure fixedly mounted on the heat insulation frame (4), a damping ring (52) is sleeved outside the positioning structure, and the heat insulation frame (4) is provided with a matching end (32) fixed with the positioning structure.

7. The centrifugal fan as claimed in claim 6, wherein a first annular groove (523) is provided on an outer side surface of an upper end of the damper ring (52), a mating hole is provided on the mating end (32), and an annular positioning ring (321) which is matched with the first annular groove (523) is provided on an inner wall of the mating hole and extends inwards.

8. The centrifugal fan as claimed in claim 7, wherein the positioning structure is a positioning column (51), a second annular groove (53) is provided on an outer side surface of the positioning column (51), and a retaining ring (521) embedded in the second annular groove (53) is provided on an inner side of the damping ring (52).

9. The centrifugal fan according to claim 8, wherein a third annular groove (54) is formed at a position where the top end of the positioning column (51) extends out of the damping ring (52), a gasket (6) is arranged in the third annular groove (54), the lower end surface of the gasket (6) is used for abutting against the top end of the damping ring (52), a snap ring (61) is arranged above the gasket (6), and a hollow damping cavity (522) is formed inside the damping ring (52).

10. The centrifugal fan according to claim 8, wherein the positioning column (51) is riveted to the heat insulation frame (4).

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