CN209638056U - A kind of noise cancelling type axial flow blower - Google Patents

Abstract

This utility model discloses a silencer-type axial flow fan, including a cubic housing; a bearing is installed at one end of the housing, and a round rod-shaped drive shaft is rotatably installed inside the bearing; a fan is threadedly connected to the end of the drive shaft that extends into the housing; an air inlet is clamped to the inner cavity of the housing near the bearing; an air outlet shroud is clamped to the inner cavity of the housing; an air outlet shroud is clamped to the outlet of the air outlet shroud; and the air outlet shroud covers the outside of the fan.

Description

A noise-absorbing axial flow fan

technical field

The utility model relates to the technical field of fans, in particular to a sound-absorbing axial flow fan.

Background technique

Axial flow fans have a wide range of uses, that is, the airflow in the same direction as the axis of the fan blades, such as electric fans and air conditioner external fans are axial flow fans. It is called axial because the gas flows parallel to the shaft of the fan.

Axial flow fan is a commonly used fan. If there is dust in the air during the operation of the fan, the high-speed moving dust will hit and rub the blades of the fan, resulting in noise, especially when the dust concentration in the air is high.

The large noise of the axial flow fan will cause serious noise pollution to the surrounding environment, and even cause damage to the health of the surrounding personnel.

Therefore, it is necessary to provide a sound-absorbing axial flow fan, which can reduce the leakage of generated noise during use, thereby reducing the adverse impact of noise on the surrounding environment and people.

Utility model content

The purpose of the utility model is to provide a sound-absorbing axial flow fan, which is used to solve the problem that the existing axial flow fans lack components for reducing noise leakage.

To achieve the above object, the technical solution of the utility model is:

A sound-absorbing axial flow fan, comprising a cube-shaped case; a bearing is rotated at one end of the case, and a round rod-shaped drive shaft is installed in the rotation of the bearing; A fan is threadedly connected to one end of the case; an air inlet tube is fastened to the inner cavity of one end of the case close to the bearing; an air outlet cover is fastened to the inner cavity of the case; The outlet of the air outlet cover is clamped with an air outlet tube; the air outlet cover is arranged on the outside of the fan.

Preferably, the air outlet cover includes a truss-shaped housing; a plurality of first sound-absorbing plates are clamped on the inner wall of the housing.

Preferably, the first sound-absorbing plate includes a cube-shaped plate body, and a cube-shaped storage cavity is pierced in the plate body; a plurality of sponges are extruded in the storage cavity; There are a plurality of arc-shaped inlet holes, and the inlet holes communicate with the storage cavity.

Preferably, the air outlet tube includes a cylindrical conveying pipe, and an air outlet hole is perforated in the conveying pipe along the axial direction of the conveying pipe; The second sound-absorbing plate; a hemispherical net is clamped in the side wall of the delivery pipe, and a plurality of circular holes are pierced on the net; spherical absorbing balls are extruded in the net.

Preferably, the second sound-absorbing plate includes an annular outer ring, and a plurality of first protrusions are evenly clamped on the inner wall of the outer ring; the first protrusions include a triangular body in longitudinal section ; A plurality of circular diversion holes are perforated in the body; a hemispherical collection groove is recessed at the outlet of the diversion holes.

Preferably, the air inlet tube includes a cylindrical first coil layer, a second coil layer is sleeved on the outside of the first coil layer; a third coil layer is sleeved on the outside of the second coil layer .

Preferably, the fan includes a plurality of fan blades; the fan blades are rectangular.

The utility model has the following advantages:

(1) When in use, air enters the chassis from the air inlet tube; the first ring layer is made of plant fiber material; the second ring layer is made of glass, and a plurality of circles are arranged in it shaped small holes; the third layer is made of wood, which is perforated with a number of circular holes; the structure of the first layer, the second layer and the third layer is loose, and the small holes inside It can consume sound ability and reduce noise;

(2) The air flows to the air outlet cover under the push of the fan; the air flow meets the first sound-absorbing plate; the air enters the storage cavity through the inlet hole and meets the Sponge; the process of air flowing in the inlet hole, and after encountering the sponge, the loose holes on the sponge can consume the energy of the sound and reduce the noise;

(3) A plurality of the first sound-absorbing plates are evenly arranged on the inner wall of the housing, and the air passing through the housing can be silenced by the plurality of the first sound-absorbing plates, so as to achieve sufficient noise reduction for the airflow and reduce the noise. noise;

(4) When in use, the absorbent belt is made of sponge material, which can fully reduce noise; and the first protrusion adopts a raised structure, and when the air flows through the outer ring, the upper part of the first protrusion Unique collection grooves and diversion holes can fully absorb the energy of the airflow and reduce noise.

Description of drawings

Fig. 1 is a schematic diagram of a noise-absorbing axial flow fan of the utility model.

Fig. 2 is a schematic diagram of the wind outlet hood in the utility model.

Fig. 3 is a schematic diagram of the first sound-absorbing plate in the utility model.

Fig. 4 is a schematic diagram of the air outlet in the utility model.

Fig. 5 is a schematic diagram of the second sound absorbing plate in the utility model.

Fig. 6 is a schematic diagram of the first protrusion in the utility model.

Fig. 7 is a schematic diagram of the air inlet cylinder in the utility model.

In the figure: 1-air outlet; 11-network; 12-second muffler plate; 121-outer ring; 122-first protrusion; 1221-body; 1222-collection tank; Ball; 14-conveyor pipe; 2-chassis; 3-outlet cover; 31-first muffler plate; 311-inlet hole; 312-board body; 313-sponge; 314-storage cavity; ; 5-air intake tube; 51-the first circle layer; 52-the second circle layer;

Detailed ways

The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

Example

The noise-absorbing axial flow fan of the present embodiment includes a cube-shaped cabinet 2; a bearing 6 is rotated at one end of the cabinet 2, and a round rod-shaped driving shaft 7 is worn through the rotation in the bearing 6; One end of the drive shaft 7 extending into the casing 2 is threadedly connected with a fan 4; an end cavity of the casing 2 close to the bearing 6 is clamped with an air inlet cylinder 5; An air outlet cover 3 is clamped in the inner cavity of the fan 2; an air outlet tube 1 is clamped at the outlet of the air outlet cover 3;

The air outlet cover 3 includes a rectangular truss-shaped housing 32 ; a plurality of first sound-absorbing plates 31 are clamped on the inner wall of the housing 32 .

The first sound-absorbing plate 31 includes a cube-shaped plate body 312, and a cube-shaped storage cavity 314 is pierced in the plate body 312; a plurality of sponges 313 are extruded in the storage cavity 314; A plurality of arc-shaped inlet holes 311 are perforated in the plate body 312 , and the inlet holes 311 communicate with the storage cavity 314 .

The air outlet tube 1 includes a cylindrical conveying pipe 14, and an air outlet hole is perforated in it along the axial direction of the conveying pipe 14; on the inner wall of the conveying pipe 14, a plurality of rings are fastened. Shaped second sound-absorbing plate 12; a hemispherical net 11 is clamped in the side wall of the delivery pipe 14, and a plurality of circular holes are perforated on the net 11; squeezed in the net 11 Spherical absorbent balls 13 are pressed.

The second sound-absorbing plate 12 includes an annular outer ring 121, and a plurality of first protrusions 122 are evenly snapped onto the inner wall of the outer ring 121; the first protrusions 122 include a triangular longitudinal section. A body 1221; a plurality of circular diversion holes 1223 are perforated in the body 1221; a hemispherical collection groove 1222 is recessed at the exit of the diversion holes 1223.

The air inlet tube 5 includes a cylindrical first ring layer 51, and a second ring layer 52 is sleeved outside the first ring layer 51; a third ring layer 52 is sleeved outside the second ring layer 52. Circle layer 53.

The fan 4 includes a plurality of fan blades; the fan blades are rectangular.

When in use, air enters the chassis from the air inlet tube; the first circle layer is made of plant fiber material; the second circle layer is made of glass, in which there are a plurality of circular small holes; the third circle layer is made of wooden boards, which are perforated with a number of small circular holes; the first circle layer, the second circle layer and the third circle layer are loose in structure, and the small holes in them can consume sound ability to reduce noise;

The air flows to the air outlet cover under the push of the fan; the airflow encounters the first sound-absorbing plate; the air enters the storage cavity through the inlet hole and encounters the sponge; the air The process of flowing in the entry hole, and after encountering the sponge, the loose holes on the sponge can consume sound energy and reduce noise;

A plurality of the first silencing plates are evenly arranged on the inner wall of the housing, and the air passing through the housing can be silencing by the multiple first silencing plates, so as to achieve sufficient silencing of the airflow and reduce noise;

When in use, the absorption belt is made of sponge material, which can fully reduce noise; and the first protrusion adopts a raised structure, and when the air flows through the outer ring, the collection groove on the first protrusion And the diversion holes can fully absorb the energy of the airflow and reduce the noise.

Although the utility model has been described in detail with general description and specific examples above, some modifications or improvements can be made on the basis of the utility model, which will be obvious to those skilled in the art. Therefore, the modifications or improvements made on the basis of not departing from the spirit of the utility model all belong to the protection scope of the utility model.

Claims (7)

1. A sound-absorbing type axial flow fan is characterized in that it comprises a cube-shaped cabinet (2); one end of the cabinet (2) is rotated with a bearing (6), and the rotation in the bearing (6) A round bar-shaped driving shaft (7) is pierced; one end of the driving shaft (7) extending into the casing (2) is screwed with a fan (4); on the casing (2) An air inlet tube (5) is snapped into the inner cavity of one end close to the bearing (6); An air outlet cover (3) is fastened to the inner cavity of the chassis (2); an air outlet tube (1) is fastened to the outlet of the air outlet cover (3); the air outlet cover (3) covers It is arranged on the outside of the fan (4). 2. The sound-absorbing axial flow fan according to claim 1, characterized in that, the air outlet cover (3) comprises a square truss-shaped casing (32); snap-fitted on the inner wall of the casing (32) There are a plurality of first sound-absorbing panels (31). 3. The sound-absorbing axial flow fan according to claim 2, characterized in that, the first sound-absorbing plate (31) comprises a cube-shaped plate body (312), and the plate body (312) is pierced with A cube-shaped storage cavity (314); a plurality of sponges (313) are extruded in the storage cavity (314); a plurality of arc-shaped entry holes (311) are perforated in the plate body (312) ), the inlet hole (311) communicates with the storage chamber (314). 4. The sound-absorbing axial flow fan according to claim 1, characterized in that, the air outlet tube (1) comprises a cylindrical conveying pipe (14), along the axial direction of the conveying pipe (14) It is pierced with an air outlet; on the inner wall of the delivery pipe (14), a plurality of ring-shaped second sound-absorbing plates (12) are fastened; on the inner wall of the delivery pipe (14) A hemispherical net (11) is connected, and a plurality of circular holes are perforated on the net (11); spherical absorbing balls (13) are extruded in the net (11). 5. The sound-absorbing axial flow fan according to claim 4, characterized in that, the second sound-absorbing plate (12) comprises an annular outer ring (121), on the inner wall of the outer ring (121) A plurality of first protrusions (122) are evenly clamped; The first protrusion (122) includes a body (1221) with a triangular longitudinal section; a plurality of circular diversion holes (1223) are perforated in the body (1221); The outlet of 1223) is concavely provided with a hemispherical collecting tank (1222). 6. The sound-absorbing axial flow fan according to claim 1, characterized in that, the air inlet tube (5) includes a cylindrical first ring layer (51), and the first ring layer (51) A second loop layer (52) is sleeved on the outside of the second loop layer (52); a third loop layer (53) is sleeved on the outside of the second loop layer (52). 7. The noise reduction axial flow fan according to claim 1, characterized in that, the fan (4) comprises a plurality of fan blades; and the fan blades are rectangular.