CN211314654U

CN211314654U - Fan volute

Info

Publication number: CN211314654U
Application number: CN201922371634.9U
Authority: CN
Inventors: 庄礼帅
Original assignee: Zhejiang Xingyi Ventilator Electrical Appliance Co ltd
Current assignee: Zhejiang Xingyi Ventilator Electrical Appliance Co ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-08-21
Anticipated expiration: 2029-12-24

Abstract

The utility model provides a fan spiral case belongs to fan technical field. It has solved the inconvenient problem of current spiral case equipment. The volute of the fan comprises a volute tongue plate and two side plates which are respectively arranged on two sides of the volute tongue plate, a cavity is formed between the two side plates and the volute tongue plate, an air inlet communicated with the cavity is formed in each side plate, edges of two sides of the volute tongue plate are bent to form strip-shaped clamping grooves, the length of each clamping groove extends along the length direction of the volute tongue plate, the cross section of each clamping groove is U-shaped, the shape and the size of each edge of each side plate are matched with the corresponding clamping groove, and the edges of the side plates are clamped in the corresponding clamping grooves; one end of the volute tongue plate, which is close to the air inlet, is bent outwards towards the cavity to form a strip-shaped groove body with a cross section in a circular arc shape, the length of the strip-shaped groove body extends along the axial direction of the air inlet, the two ends of the strip-shaped groove body are respectively abutted against and pressed on the two side plates, arc-shaped notches which are opposite to and communicated with the strip-shaped groove body are respectively arranged on the two side plates, and the strip-shaped groove body, the two side plates and the other end of the volute. This fan spiral case equipment is convenient.

Description

Fan volute

Technical Field

The utility model belongs to the technical field of the fan, a fan, especially a fan spiral case are related to.

Background

The fan belongs to one of impeller machines, is widely applied to various fields such as energy, environment, aviation and the like, and is one of main energy consumption devices in industrial and agricultural production.

The blower volute is an important component of the blower, and is as disclosed in chinese patent library as a blower volute [ application number: 201810755291.3, including first curb plate, second curb plate and snail shape board, both sides about snail shape board are fixed respectively to this first curb plate and second curb plate, snail shape board forms the curved surface form that both ends are contactless by flat arc bending, and one end is high, the other end is low, the outside extension of tangential direction is followed to the one end that snail shape board is high forms the roof, the outside extension of one end that snail shape board is low forms the bottom plate, first curb plate extends formation left front side board to this roof and bottom plate direction, the second curb plate extends formation right front side board to roof and bottom plate direction, wherein left front side board, right front side board, the air outlet of roof and bottom plate besieged city fan spiral case, the air outlet inner wall is equipped with the muffler.

In the volute, the side plates and the volute plate are fixedly connected through welding, and when the volute is actually assembled, the side plates and the volute plate need to be aligned to the position to be welded and installed, so that certain installation difficulty and inconvenience exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems in the prior art, and provides a fan volute convenient to assemble.

The purpose of the utility model can be realized by the following technical proposal: a fan volute comprises a volute tongue plate and two side plates arranged on two sides of the volute tongue plate respectively, a cavity is formed between the two side plates and the volute tongue plate, and an air inlet communicated with the cavity is formed in each side plate; one end of the volute tongue plate, which is close to the air inlet, is bent outwards towards the cavity to form a strip-shaped groove body with a circular arc-shaped cross section, the length of the strip-shaped groove body extends along the axial direction of the air inlet, two ends of the strip-shaped groove body are respectively abutted against the two side plates, arc-shaped notches which are opposite to and communicated with the strip-shaped groove body are formed in the two side plates, and the air outlet communicated with the cavity is formed by enclosing the outer wall of the strip-shaped groove body, the two side plates and the other.

The assembly process is as follows: in an initial state, the width of the clamping groove is larger than the thickness of the edge of the side plate, so that the side plate can be conveniently inserted; then, rolling one side of the clamping groove by using a rolling die to enable the clamping groove to be contracted and tightly pressed with the edge of the side plate to complete assembly; in the whole installation, the clamping groove plays a guiding role in installation of the side plate, and compresses the forming volute with the side plate, so that the installation steps are effectively reduced, the installation difficulty is reduced, and the whole assembly is convenient.

The strip-shaped groove with the arc-shaped cross section formed at the air outlet of the volute tongue plate and the arc-shaped notches correspondingly are formed in the side plates, so that the strength of the volute at the air outlet can be effectively enhanced, the service life is prolonged, and the running stability of the fan can be ensured.

In the fan volute, the side plate is provided with a rib groove formed by sinking from the inside of the cavity to the outside of the cavity so as to enhance the strength of the side plate.

In the blower volute, the rib groove is arc-shaped, and the length of the rib groove extends along the length direction of the volute tongue plate.

In the fan volute, the width of the rib groove is gradually increased along with the direction of gas exhausted from the cavity and through the air outlet.

In the fan volute, each side plate is at least provided with two rib grooves, and the plurality of rib grooves on the same side plate are distributed at intervals along the extension direction of the length of the volute tongue plate.

In the blower volute, on the same side plate, the minimum groove width of the rib groove close to the air outlet is larger than the maximum groove width of the adjacent rib groove.

Compared with the prior art, the fan volute has the following advantages:

1. in the whole installation of spiral case, the draw-in groove had both played the guide effect to the curb plate installation, compressed tightly the shaping spiral case with the curb plate again to effectively reduce the installation step and reduce the installation degree of difficulty, make whole equipment comparatively convenient.

2. The strip-shaped groove with the arc-shaped cross section formed at the air outlet of the volute tongue plate and the arc-shaped notches correspondingly are formed in the side plates, so that the strength of the volute at the air outlet can be effectively enhanced, the service life is prolonged, and the running stability of the fan can be ensured.

3. A plurality of outer concave muscle grooves of shaping on the curb plate, and muscle groove width makes curb plate intensity constantly strengthen along with the gas flow direction along with gas flow direction grow gradually along with the gas flow direction to ensure the structural stability of whole spiral case, make fan even running.

Drawings

Fig. 1 is a schematic perspective view of the volute of the fan.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is a perspective view of the side panel.

In the figure, 1, a volute tongue plate; 1a, a clamping groove; 1b, a strip-shaped groove body; 2. a side plate; 2a, an air inlet; 2b, rib grooves; 2c, an arc notch; 3. a cavity; 4. and (7) air outlet.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in figure 1, the volute of the fan comprises a volute tongue plate 1 and two side plates 2 which are respectively arranged on two sides of the volute tongue plate 1, a cavity 3 is formed between the two side plates 2 and the volute tongue plate 1, and air inlets 2a which are opposite to and communicated with the cavity 3 are respectively arranged on the two side plates 2. In the present embodiment, one of the two ends of the volute tongue plate 1 is closer to the air inlet 2 a.

Specifically, as shown in fig. 1 and fig. 2, two side edges of the tongue plate 1 are bent to form a strip-shaped slot 1a, and two ends of the slot 1a are open. The length of the clamping groove 1a extends along the length direction of the volute tongue plate 1, and the cross section of the clamping groove 1a is U-shaped. The shape and the size of the edge of the side plate 2 are matched with the clamping grooves 1a, and the edge of the side plate 2 is clamped in the corresponding clamping grooves 1 a. The assembly process is as follows: in an initial state, the width of the clamping groove 1a is larger than the thickness of the edge of the side plate 2, so that the side plate 2 can be conveniently inserted; and then, rolling one side of the clamping groove 1a by using a rolling die to enable the clamping groove 1a to contract and tightly press the side plate 2 to complete assembly.

Further, as shown in fig. 1 and 3, the side plate 2 has a rib groove 2b formed by recessing from the inside of the cavity 3 to the outside of the cavity 3, the rib groove 2b is arc-shaped, and the length of the rib groove 2b extends along the length direction of the volute tongue plate 1. Every curb plate 2 all is equipped with two muscle grooves 2b at least on, and is located a plurality of muscle grooves 2b on the same curb plate 2 and along 1 length extension direction interval distribution of snail tongue board. Preferably, three rib grooves 2b are formed in each side plate 2. The width of the rib groove 2b gradually increases along with the direction of gas discharging from the cavity 3 through the air outlet 4, and on the same side plate 2, the minimum groove width of the rib groove 2b close to the air outlet 4 is larger than the maximum groove width of the adjacent rib groove 2 b.

As shown in fig. 1 and 3, one end of the tongue plate 1, which is close to the air inlet 2a, is bent towards the outside of the cavity 3 to form a strip-shaped groove body 1b with a circular arc-shaped cross section, the length of the strip-shaped groove body 1b extends along the axial direction of the air inlet 2a, two ends of the strip-shaped groove body 1b are respectively pressed against the two side plates 2, arc-shaped notches 2c which are opposite to and communicated with the strip-shaped groove body 1b are respectively arranged on the two side plates 2, and an air outlet 4 communicated with the cavity 3 is defined by the outer wall of the strip-shaped groove body 1b, the two side plates 2 and the. The strip-shaped groove with the arc-shaped cross section and the arc-shaped notch 2c corresponding to the side plate 2 are formed at the air outlet 4 of the volute tongue plate 1, so that the strength of the volute at the air outlet 4 can be effectively enhanced, the service life of the volute is prolonged, and the running stability of a fan can be ensured.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A fan volute comprises a volute plate (1) and two side plates (2) which are arranged on two sides of the volute plate (1) respectively, a cavity (3) is formed between the two side plates (2) and the volute plate (1), and an air inlet (2a) communicated with the cavity (3) is formed in each side plate (2), the fan volute is characterized in that the edges of two sides of the volute plate (1) are bent to form a strip-shaped clamping groove (1a), the length of each clamping groove (1a) extends along the length direction of the volute plate (1), the cross section of each clamping groove (1a) is U-shaped, the shape and the size of the edge of each side plate (2) are matched with the corresponding clamping groove (1a), and the edge of each side plate (2) is clamped in the corresponding clamping groove (1 a); one end of the volute tongue plate (1) close to the air inlet (2a) is bent towards the outside of the cavity (3) to form a strip-shaped groove body (1b) with a circular arc-shaped cross section, the length of the strip-shaped groove body (1b) extends along the axial direction of the air inlet (2a), two ends of the strip-shaped groove body (1b) are respectively pressed on the two side plates (2), arc-shaped notches (2c) which are opposite to and communicated with the strip-shaped groove body (1b) are formed in the two side plates (2), and the outer wall of the strip-shaped groove body (1b), the two side plates (2) and the other end of the volute tongue plate (1) are enclosed into an air outlet (4) communicated with the cavity (.

2. The blower volute according to claim 1, wherein the side plate (2) has a rib groove (2b) formed by recessing from the inside of the cavity (3) to the outside of the cavity (3).

3. The blower volute according to claim 2, wherein the rib groove (2b) is arc-shaped, and the length of the rib groove (2b) extends along the length direction of the volute tongue plate (1).

4. The blower volute according to claim 2, wherein the width of the rib groove (2b) is gradually increased along with the direction of the gas discharged from the chamber (3) through the outlet (4).

5. The blower volute according to claim 4, wherein each side plate (2) has at least two of the above-mentioned rib grooves (2b), and the plurality of rib grooves (2b) on the same side plate (2) are distributed at intervals along the length extension direction of the tongue plate (1).

6. The blower volute according to claim 5, wherein on the same side plate (2), the smallest groove width of the rib groove (2b) adjacent to the air outlet (4) is larger than the largest groove width of the adjacent rib groove (2 b).